-*- coding: utf-8 -*- Changes with Apache 2.4.65 *) SECURITY: CVE-2025-54090: Apache HTTP Server: 'RewriteCond expr' always evaluates to true in 2.4.64 (cve.mitre.org) A bug in Apache HTTP Server 2.4.64 results in all "RewriteCond expr ..." tests evaluating as "true". Users are recommended to upgrade to version 2.4.65, which fixes the issue. Changes with Apache 2.4.64 *) SECURITY: CVE-2025-53020: Apache HTTP Server: HTTP/2 DoS by Memory Increase (cve.mitre.org) Late Release of Memory after Effective Lifetime vulnerability in Apache HTTP Server. This issue affects Apache HTTP Server: from 2.4.17 up to 2.4.63. Users are recommended to upgrade to version 2.4.64, which fixes the issue. Credits: Gal Bar Nahum *) SECURITY: CVE-2025-49812: Apache HTTP Server: mod_ssl TLS upgrade attack (cve.mitre.org) In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade. Only configurations using "SSLEngine optional" to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade. Credits: Robert Merget (Technology Innovation Institute) *) SECURITY: CVE-2025-49630: Apache HTTP Server: mod_proxy_http2 denial of service (cve.mitre.org) In certain proxy configurations, a denial of service attack against Apache HTTP Server versions 2.4.26 through to 2.4.63 can be triggered by untrusted clients causing an assertion in mod_proxy_http2. Configurations affected are a reverse proxy is configured for an HTTP/2 backend, with ProxyPreserveHost set to "on". Credits: Anthony CORSIEZ *) SECURITY: CVE-2025-23048: Apache HTTP Server: mod_ssl access control bypass with session resumption (cve.mitre.org) In some mod_ssl configurations on Apache HTTP Server 2.4.35 through to 2.4.62, an access control bypass by trusted clients is possible using TLS 1.3 session resumption. Configurations are affected when mod_ssl is configured for multiple virtual hosts, with each restricted to a different set of trusted client certificates (for example with a different SSLCACertificateFile/Path setting). In such a case, a client trusted to access one virtual host may be able to access another virtual host, if SSLStrictSNIVHostCheck is not enabled in either virtual host. Credits: Sven Hebrok, Felix Cramer, Tim Storm, Maximilian Radoy, and Juraj Somorovsky at Paderborn University *) SECURITY: CVE-2024-47252: Apache HTTP Server: mod_ssl error log variable escaping (cve.mitre.org) Insufficient escaping of user-supplied data in mod_ssl in Apache HTTP Server 2.4.63 and earlier allows an untrusted SSL/TLS client to insert escape characters into log files in some configurations. In a logging configuration where CustomLog is used with "%{varname}x" or "%{varname}c" to log variables provided by mod_ssl such as SSL_TLS_SNI, no escaping is performed by either mod_log_config or mod_ssl and unsanitized data provided by the client may appear in log files. Credits: John Runyon *) SECURITY: CVE-2024-43394: Apache HTTP Server: SSRF on Windows due to UNC paths (cve.mitre.org) Server-Side Request Forgery (SSRF) in Apache HTTP Server on Windows allows to potentially leak NTLM hashes to a malicious server via mod_rewrite or apache expressions that pass unvalidated request input. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.63. Note: The Apache HTTP Server Project will be setting a higher bar for accepting vulnerability reports regarding SSRF via UNC paths. The server offers limited protection against administrators directing the server to open UNC paths. Windows servers should limit the hosts they will connect over via SMB based on the nature of NTLM authentication. Credits: Kainan Zhang (@4xpl0r3r) from Fortinet *) SECURITY: CVE-2024-43204: Apache HTTP Server: SSRF with mod_headers setting Content-Type header (cve.mitre.org) SSRF in Apache HTTP Server with mod_proxy loaded allows an attacker to send outbound proxy requests to a URL controlled by the attacker. Requires an unlikely configuration where mod_headers is configured to modify the Content-Type request or response header with a value provided in the HTTP request. Users are recommended to upgrade to version 2.4.64 which fixes this issue. *) SECURITY: CVE-2024-42516: Apache HTTP Server: HTTP response splitting (cve.mitre.org) HTTP response splitting in the core of Apache HTTP Server allows an attacker who can manipulate the Content-Type response headers of applications hosted or proxied by the server can split the HTTP response. This vulnerability was described as CVE-2023-38709 but the patch included in Apache HTTP Server 2.4.59 did not address the issue. Users are recommended to upgrade to version 2.4.64, which fixes this issue. Credits: xiaojunjie@安恒信息杭州市滨江区技能大师工作室 *) mod_proxy_ajp: Use iobuffersize set on worker level for the IO buffer size. PR 69402 [Jari Ahonen ] *) mod_ssl: Drop $SSLKEYLOGFILE handling internally for OpenSSL 3.5 builds which enable it in libssl natively. [Joe Orton] *) mod_asis: Fix the log level of the message AH01236. Github #527 [Michael Kaufmann ] *) mod_session_dbd: ensure format used with SessionDBDCookieName and SessionDBDCookieName2 are correct. Github #503 [Thomas Meyer ] *) mod_headers: 'RequestHeader set|edit|edit_r Content-Type X' could inadvertently modify the Content-Type _response_ header. Applies to Content-Type only and likely to only affect static file responses. [Eric Covener] *) mod_ssl: Remove warning over potential uninitialised value for ssl protocol prior to protocol selection. [Graham Leggett] *) mod_proxy: Reuse ProxyRemote connections when possible, like prior to 2.4.59. [Jean-Frederic Clere, Yann Ylavic] *) mod_systemd: Add systemd socket activation support. [Paul Querna, Jan Kaluza, Lubos Uhliarik , Joe Orton] *) mod_systemd: Log the SELinux context at startup if available and enabled. [Joe Orton] *) mod_http2: update to version 2.0.32 The code setting the connection window size was set wrong, preventing `H2WindowSize` to work. Fixed . [Stefan Eissing, Michael Kaufmann] *) mod_http2: update to version 2.0.30 - Fixed bug in handling over long response headers. When the 64 KB limit of nghttp2 was exceeded, the request was not reset and the client was left hanging, waiting for it. Now the stream is reset. - Added new directive `H2MaxHeaderBlockLen` to set the limit on response header sizes. - Fixed handling of Timeout vs. KeepAliveTimeout when first request on a connection was reset. *) mod_lua: Fix memory handling in LuaOutputFilter. PR 69590. [Guillermo Grandes ] * mod_proxy_http2: revert r1912193 for detecting broken backend connections as this interferes with backend selection who a node is unresponsive. PR69624. *) mod_proxy_balancer: Fix a regression that caused stickysession keys no longer be recognized if they are provided as query parameter in the URL. PR 69443 [Ruediger Pluem] *) mod_md: update to version 2.5.2 - Fixed TLS-ALPN-01 challenges when multiple `MDPrivateKeys` are specified with EC keys before RSA ones. Fixes #377. [Stefan Eissing] - Fixed missing newlines in the status page output. [Andreas Groth] *) mod_dav: Add API to expose DavBasePath setting. [Joe Orton] *) mod_md: update to version 2.5.1 - Added support for ACME profiles with new directives MDProfile and MDProfileMandatory. - When installing a custom CA file via `MDCACertificateFile`, also set the libcurl option CURLSSLOPT_NO_REVOKE that suppresses complains by Schannel (when curl is linked with it) about missing CRL/OCSP in certificates. - Fixed handling of corrupted httpd.json and added test 300_30 for it. File is removed on error and written again. Fixes #369. - Added explanation in log for how to proceed when md_store.json could not be parsed and prevented the server start. - restored fixed to #336 and #337 which got lost in a sync with Apache svn - Add Issue Name/Uris to certificate information in md-status handler - MDomains with static certificate files have MDRenewMode "manual", unless "always" is configured. *) core: Report invalid Options= argument when parsing AllowOverride directives. Github #310 [Zhou Qingyang ] *) scoreboard/mod_http2: record durations of HTTP/2 requests. PR 69579 [Pierre Brochard ] Changes with Apache 2.4.63 *) mod_dav: Update redirect-carefully example BrowserMatch config to match more recent client versions. PR 66148, 67039. [Michal Maloszewski , Romain Tartière ] *) mod_cache_socache: Fix possible crash on error path. PR 69358. [Ruediger Pluem] *) mod_ssl: Fail cleanly at startup if OpenSSL initialization fails. [StephenWall] *) mod_md: update to version 2.4.31 - Improved error reporting when waiting for ACME server to verify domains or finalizing the order fails, e.g. times out. - Increasing the timeouts to wait for ACME server to verify domain names and issue the certificate from 30 seconds to 5 minutes. - Change a log level from error to debug when Stapling is enabled but a certificate carries no OCSP responder URL. *) mod_proxy_balancer: Fix the handling of the stickysession configuration parameter by the balancer manager. PR 69510 [Yutaka Tokunou ] *) Add the ldap-search option to mod_authnz_ldap, allowing authorization to be based on arbitrary expressions that do not include the username. Make sure that when ldap searches are too long, we explicitly log the error. [Graham Leggett] *) mod_proxy: Honor parameters of ProxyPassMatch workers with substitution in the host name or port. PR 69233. [Yann Ylavic] *) mod_log_config: Fix merging for the "LogFormat" directive. PR 65222. [Michael Kaufmann ] *) mod_lua: Make r.ap_auth_type writable. PR 62497. [Michael Osipov ] *) mod_md: update to version 2.4.29 - Fixed HTTP-01 challenges to not carry a final newline, as some ACME server fail to ignore it. [Michael Kaufmann (@mkauf)] - Fixed missing label+newline in server-status plain text output when MDStapling is enabled. *) mod_ssl: Restore support for loading PKCS#11 keys via ENGINE without "SSLCryptoDevice" configured. [Joe Orton] *) mod_authnz_ldap: Fix possible memory corruption if the AuthLDAPSubGroupAttribute directive is configured. [Joe Orton] *) mod_proxy_fcgi: Don't re-encode SCRIPT_FILENAME when set via SetHandler. PR 69203. [Yann Ylavic] *) mod_rewrite, mod_proxy: mod_proxy to canonicalize rewritten [P] URLs, including "unix:" ones. PR 69235, PR 69260. [Yann Ylavic, Ruediger Pluem] *) mod_rewrite: Error out in case a RewriteRule in directory context uses the proxy, but mod_proxy is not loaded. PR 56264. [Christophe Jaillet, Michael Streeter ] *) http: Remove support for Request-Range header sent by Navigator 2-3 and MSIE 3. [Stefan Fritsch] *) mod_rewrite: Don't require [UNC] flag to preserve a leading // added by applying the perdir prefix to the substitution. [Ruediger Pluem, Eric Covener] *) Windows: Restore the ability to "Include" configuration files on UNC paths. PR 69313 [Eric Covener] *) mod_proxy: Avoid AH01059 parsing error for SetHandler "unix:" URLs in (incomplete fix in 2.4.62). PR 69160. [Yann Ylavic] *) mod_md: update to version 2.4.28 - When the server starts, it looks for new, staged certificates to activate. If the staged set of files in 'md/staging/' is messed up, this could prevent further renewals to happen. Now, when the staging set is present, but could not be activated due to an error, purge the whole directory. [icing] - Fix certificate retrieval on ACME renewal to not require a 'Location:' header returned by the ACME CA. This was the way it was done in ACME before it became an IETF standard. Let's Encrypt still supports this, but other CAs do not. [icing] - Restore compatibility with OpenSSL ] *) mod_ssl: Restore SSL dumping on trace7 loglevel with OpenSSL >= 3.0. [Ruediger Pluem, Yann Ylavic] *) mpm_worker: Fix possible warning (AH00045) about children processes not terminating timely. [Yann Ylavic] Changes with Apache 2.4.61 *) SECURITY: CVE-2024-39884: Apache HTTP Server: source code disclosure with handlers configured via AddType (cve.mitre.org) A regression in the core of Apache HTTP Server 2.4.60 ignores some use of the legacy content-type based configuration of handlers. "AddType" and similar configuration, under some circumstances where files are requested indirectly, result in source code disclosure of local content. For example, PHP scripts may be served instead of interpreted. Users are recommended to upgrade to version 2.4.61, which fixes this issue. Changes with Apache 2.4.60 *) SECURITY: CVE-2024-39573: Apache HTTP Server: mod_rewrite proxy handler substitution (cve.mitre.org) Potential SSRF in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to cause unsafe RewriteRules to unexpectedly setup URL's to be handled by mod_proxy. Credits: Orange Tsai (@orange_8361) from DEVCORE *) SECURITY: CVE-2024-38477: Apache HTTP Server: Crash resulting in Denial of Service in mod_proxy via a malicious request (cve.mitre.org) null pointer dereference in mod_proxy in Apache HTTP Server 2.4.59 and earlier allows an attacker to crash the server via a malicious request. Credits: Orange Tsai (@orange_8361) from DEVCORE *) SECURITY: CVE-2024-38476: Apache HTTP Server may use exploitable/malicious backend application output to run local handlers via internal redirect (cve.mitre.org) Vulnerability in core of Apache HTTP Server 2.4.59 and earlier are vulnerably to information disclosure, SSRF or local script execution via backend applications whose response headers are malicious or exploitable. Note: Some legacy uses of the 'AddType' directive to connect a request to a handler must be ported to 'AddHandler' after this fix. Credits: Orange Tsai (@orange_8361) from DEVCORE *) SECURITY: CVE-2024-38475: Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path. (cve.mitre.org) Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected. Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained. Credits: Orange Tsai (@orange_8361) from DEVCORE *) SECURITY: CVE-2024-38474: Apache HTTP Server weakness with encoded question marks in backreferences (cve.mitre.org) Substitution encoding issue in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows attacker to execute scripts in directories permitted by the configuration but not directly reachable by any URL or source disclosure of scripts meant to only to be executed as CGI. Note: Some RewriteRules that capture and substitute unsafely will now fail unless rewrite flag "UnsafeAllow3F" is specified. Credits: Orange Tsai (@orange_8361) from DEVCORE *) SECURITY: CVE-2024-38473: Apache HTTP Server proxy encoding problem (cve.mitre.org) Encoding problem in mod_proxy in Apache HTTP Server 2.4.59 and earlier allows request URLs with incorrect encoding to be sent to backend services, potentially bypassing authentication via crafted requests. Credits: Orange Tsai (@orange_8361) from DEVCORE *) SECURITY: CVE-2024-38472: Apache HTTP Server on Windows UNC SSRF (cve.mitre.org) SSRF in Apache HTTP Server on Windows allows to potentially leak NTML hashes to a malicious server via SSRF and malicious requests or content Note: Existing configurations that access UNC paths will have to configure new directive "UNCList" to allow access during request processing. Credits: Orange Tsai (@orange_8361) from DEVCORE *) SECURITY: CVE-2024-36387: Apache HTTP Server: DoS by Null pointer in websocket over HTTP/2 (cve.mitre.org) Serving WebSocket protocol upgrades over a HTTP/2 connection could result in a Null Pointer dereference, leading to a crash of the server process, degrading performance. Credits: Marc Stern () *) mod_proxy: Fix DNS requests and connections closed before the configured addressTTL. PR 69126. [Yann Ylavic] *) core: On Linux, log the real thread ID in error logs. [Joe Orton] *) core: Support zone/scope in IPv6 link-local addresses in Listen and VirtualHost directives (requires APR 1.7.x or later). PR 59396 [Joe Orton] *) mod_ssl: Reject client-initiated renegotiation with a TLS alert (rather than connection closure). [Joe Orton, Yann Ylavic] *) Updated mime.types. [Mohamed Akram , Adam Silverstein ] *) mod_ssl: Fix a regression that causes the default DH parameters for a key no longer set and thus effectively disabling DH ciphers when no explicit DH parameters are set. PR 68863 [Ruediger Pluem] *) mod_cgid: Optional support for file descriptor passing, fixing error log handling (configure --enable-cgid-fdpassing) on Unix platforms. PR 54221. [Joe Orton] *) mod_cgid/mod_cgi: Distinguish script stderr output clearly in error logs. PR 61980. [Hank Ibell ] *) mod_tls: update version of rustls-ffi to v0.13.0. [Daniel McCarney (@cpu}] *) mod_md: - Using OCSP stapling information to trigger certificate renewals. Proposed by @frasertweedale. - Added directive `MDCheckInterval` to control how often the server checks for detected revocations. Added proposals for configurations in the README.md chapter "Revocations". - OCSP stapling: accept OCSP responses without a `nextUpdate` entry which is allowed in RFC 6960. Treat those as having an update interval of 12 hours. Added by @frasertweedale. - Adapt OpenSSL usage to changes in their API. By Yann Ylavic. Changes with Apache 2.4.59 *) SECURITY: CVE-2024-27316: Apache HTTP Server: HTTP/2 DoS by memory exhaustion on endless continuation frames (cve.mitre.org) HTTP/2 incoming headers exceeding the limit are temporarily buffered in nghttp2 in order to generate an informative HTTP 413 response. If a client does not stop sending headers, this leads to memory exhaustion. Credits: Bartek Nowotarski (https://nowotarski.info/) *) SECURITY: CVE-2024-24795: Apache HTTP Server: HTTP Response Splitting in multiple modules (cve.mitre.org) HTTP Response splitting in multiple modules in Apache HTTP Server allows an attacker that can inject malicious response headers into backend applications to cause an HTTP desynchronization attack. After this change, CGI-like scripts cannot set Transfer-Encoding or Content-Length headers. To restore the ability to set Content-Length header, set per-request environment variable 'ap_trust_cgilike_cl' to any non-empty value. Credits: Keran Mu, Tsinghua University and Zhongguancun Laboratory. *) SECURITY: CVE-2023-38709: Apache HTTP Server: HTTP response splitting (cve.mitre.org) Faulty input validation in the core of Apache allows malicious or exploitable backend/content generators to split HTTP responses. This issue affects Apache HTTP Server: through 2.4.58. Credits: Orange Tsai (@orange_8361) from DEVCORE *) mod_deflate: Fixes and better logging for handling various error and edge cases. [Eric Covener, Yann Ylavic, Joe Orton, Eric Norris ] *) Add CGIScriptTimeout to mod_cgi. [Eric Covener] *) mod_xml2enc: Tolerate libxml2 2.12.0 and later. PR 68610 [ttachi ] *) mod_slotmem_shm: Use ap_os_is_path_absolute() to make it portable. [Jean-Frederic Clere] *) mod_ssl: Use OpenSSL-standard functions to assemble CA name lists for SSLCACertificatePath/SSLCADNRequestPath. Names will now be consistently sorted. PR 61574. [Joe Orton] *) mod_xml2enc: Update check to accept any text/ media type or any XML media type per RFC 7303, avoiding corruption of Microsoft OOXML formats. PR 64339. [Joseph Heenan , Joe Orton] *) mod_http2: v2.0.26 with the following fixes: - Fixed `Date` header on requests upgraded from HTTP/1.1 (h2c). Fixes . - Fixed small memory leak in h2 header bucket free. Thanks to Michael Kaufmann for finding this and providing the fix. *) htcacheclean: In -a/-A mode, list all files per subdirectory rather than only one. PR 65091. [Artem Egorenkov ] *) mod_ssl: SSLProxyMachineCertificateFile/Path may reference files which include CA certificates; those CA certs are treated as if configured with SSLProxyMachineCertificateChainFile. [Joe Orton] *) htpasswd, htdbm, dbmmanage: Update help&docs to refer to "hashing", rather than "encrypting" passwords. [Michele Preziuso ] *) mod_ssl: Fix build with LibreSSL 2.0.7+. PR 64047. [Giovanni Bechis, Yann Ylavic] *) htpasswd: Add support for passwords using SHA-2. [Joe Orton, Yann Ylavic] *) core: Allow mod_env to override system environment vars. [Joe Orton] *) Allow mod_dav_fs to tolerate race conditions between PROPFIND and an operation which removes a directory/file between apr_dir_read() and apr_stat(). Current behaviour is to abort the connection which seems inferior to tolerating (and logging) the error. [Joe Orton] *) mod_ldap: HTML-escape data in the ldap-status handler. [Eric Covener, Chamal De Silva] *) mod_ssl: Disable the OpenSSL ENGINE API when OPENSSL_NO_ENGINE is set. Allow for "SSLCryptoDevice builtin" if the ENGINE API is not available, notably with OpenSSL >= 3. PR 68080. [Yann Ylavic, Joe Orton] *) mod_ssl: Improve compatibility with OpenSSL 3, fix build warnings about deprecated ENGINE_ API, honor OPENSSL_API_COMPAT setting while defaulting to compatibitily with version 1.1.1 (including ENGINEs / SSLCryptoDevice). [Yann Ylavic] *) mod_ssl: release memory to the OS when needed. [Giovanni Bechis] *) mod_proxy: Ignore (and warn about) enablereuse=on for ProxyPassMatch when some dollar substitution (backreference) happens in the hostname or port part of the URL. [Yann Ylavic] *) mod_proxy: Allow to set a TTL for how long DNS resolutions to backend systems are cached. [Yann Ylavic] *) mod_proxy: Add optional third argument for ProxyRemote, which configures Basic authentication credentials to pass to the remote proxy. PR 37355. [Joe Orton] Changes with Apache 2.4.58 *) SECURITY: CVE-2023-45802: Apache HTTP Server: HTTP/2 stream memory not reclaimed right away on RST (cve.mitre.org) When a HTTP/2 stream was reset (RST frame) by a client, there was a time window were the request's memory resources were not reclaimed immediately. Instead, de-allocation was deferred to connection close. A client could send new requests and resets, keeping the connection busy and open and causing the memory footprint to keep on growing. On connection close, all resources were reclaimed, but the process might run out of memory before that. This was found by the reporter during testing of CVE-2023-44487 (HTTP/2 Rapid Reset Exploit) with their own test client. During "normal" HTTP/2 use, the probability to hit this bug is very low. The kept memory would not become noticeable before the connection closes or times out. Users are recommended to upgrade to version 2.4.58, which fixes the issue. Credits: Will Dormann of Vul Labs *) SECURITY: CVE-2023-43622: Apache HTTP Server: DoS in HTTP/2 with initial windows size 0 (cve.mitre.org) An attacker, opening a HTTP/2 connection with an initial window size of 0, was able to block handling of that connection indefinitely in Apache HTTP Server. This could be used to exhaust worker resources in the server, similar to the well known "slow loris" attack pattern. This has been fixed in version 2.4.58, so that such connection are terminated properly after the configured connection timeout. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.57. Users are recommended to upgrade to version 2.4.58, which fixes the issue. Credits: Prof. Sven Dietrich (City University of New York) *) SECURITY: CVE-2023-31122: mod_macro buffer over-read (cve.mitre.org) Out-of-bounds Read vulnerability in mod_macro of Apache HTTP Server.This issue affects Apache HTTP Server: through 2.4.57. Credits: David Shoon (github/davidshoon) *) mod_ssl: Silence info log message "SSL Library Error: error:0A000126: SSL routines::unexpected eof while reading" when using OpenSSL 3 by setting SSL_OP_IGNORE_UNEXPECTED_EOF if available. [Rainer Jung] *) mod_http2: improved early cleanup of streams. [Stefan Eissing] *) mod_proxy_http2: improved error handling on connection errors while response is already underway. [Stefan Eissing] *) mod_http2: fixed a bug that could lead to a crash in main connection output handling. This occured only when the last request on a HTTP/2 connection had been processed and the session decided to shut down. This could lead to an attempt to send a final GOAWAY while the previous write was still in progress. See PR 66646. [Stefan Eissing] *) mod_proxy_http2: fix `X-Forward-Host` header to carry the correct value. Fixes PR66752. [Stefan Eissing] *) mod_http2: added support for bootstrapping WebSockets via HTTP/2, as described in RFC 8441. A new directive 'H2WebSockets on|off' has been added. The feature is by default not enabled. As also discussed in the manual, this feature should work for setups using "ProxyPass backend-url upgrade=websocket" without further changes. Special server modules for WebSockets will have to be adapted, most likely, as the handling if IO events is different with HTTP/2. HTTP/2 WebSockets are supported on platforms with native pipes. This excludes Windows. [Stefan Eissing] *) mod_rewrite: Fix a regression with both a trailing ? and [QSA]. in OCSP stapling. PR 66672. [Frank Meier , covener] *) mod_http2: fixed a bug in flushing pending data on an already closed connection that could lead to a busy loop, preventing the HTTP/2 session to close down successfully. Fixed PR 66624. [Stefan Eissing] *) mod_http2: v2.0.15 with the following fixes and improvements - New directive 'H2EarlyHint name value' to add headers to a response, picked up already when a "103 Early Hints" response is sent. 'name' and 'value' must comply to the HTTP field restrictions. This directive can be repeated several times and header fields of the same names add. Sending a 'Link' header with 'preload' relation will also cause a HTTP/2 PUSH if enabled and supported by the client. - Fixed an issue where requests were not logged and accounted in a timely fashion when the connection returns to "keepalive" handling, e.g. when the request served was the last outstanding one. This led to late appearance in access logs with wrong duration times reported. - Accurately report the bytes sent for a request in the '%O' Log format. This addresses #203, a long outstanding issue where mod_h2 has reported numbers over-eagerly from internal buffering and not what has actually been placed on the connection. The numbers are now the same with and without H2CopyFiles enabled. [Stefan Eissing] *) mod_proxy_http2: fix retry handling to not leak temporary errors. On detecting that that an existing connection was shutdown by the other side, a 503 response leaked even though the request was retried on a fresh connection. [Stefan Eissing] *) mod_rewrite: Add server directory to include path as mod_rewrite requires test_char.h. PR 66571 [Valeria Petrov ] *) mod_http2: new directive `H2ProxyRequests on|off` to enable handling of HTTP/2 requests in a forward proxy configuration. General forward proxying is enabled via `ProxyRequests`. If the HTTP/2 protocol is also enabled for such a server/host, this new directive is needed in addition. [Stefan Eissing] *) core: Updated conf/mime.types: - .js moved from 'application/javascript' to 'text/javascript' - .mjs was added as 'text/javascript' - add .opus ('audio/ogg') - add 'application/vnd.geogebra.slides' - add WebAssembly MIME types and extension [Mathias Bynens via PR 318, Richard de Boer , Dave Hodder , Zbynek Konecny ] *) mod_proxy_http2: fixed using the wrong "bucket_alloc" from the backend connection when sending data on the frontend one. This caused crashes or infinite loops in rare situations. *) mod_proxy_http2: fixed a bug in retry/response handling that could lead to wrong status codes or HTTP messages send at the end of response bodies exceeding the announced content-length. *) mod_proxy_http2: fix retry handling to not leak temporary errors. On detecting that that an existing connection was shutdown by the other side, a 503 response leaked even though the request was retried on a fresh connection. *) mod_http2: fixed a bug that did cleanup of consumed and pending buckets in the wrong order when a bucket_beam was destroyed. [Stefan Eissing] *) mod_http2: avoid double chunked-encoding on internal redirects. PR 66597 [Yann Ylavic, Stefan Eissing] *) mod_http2: Fix reporting of `Total Accesses` in server-status to not count HTTP/2 requests twice. Fixes PR 66801. [Stefan Eissing] *) mod_ssl: Fix handling of Certificate Revoked messages in OCSP stapling. PR 66626. [] *) mod_http2: fixed a bug in handling of stream timeouts. [Stefan Eissing] *) mod_tls: updating to rustls-ffi version 0.9.2 or higher. Checking in configure for proper version installed. Code fixes for changed clienthello member name. [Stefan Eissing] *) mod_md: - New directive `MDMatchNames all|servernames` to allow more control over how MDomains are matched to VirtualHosts. - New directive `MDChallengeDns01Version`. Setting this to `2` will provide the command also with the challenge value on `teardown` invocation. In version 1, the default, only the `setup` invocation gets this parameter. Refs #312. Thanks to @domrim for the idea. - For Managed Domain in "manual" mode, the checks if all used ServerName and ServerAlias are part of the MDomain now reports a warning instead of an error (AH10040) when not all names are present. - MDChallengeDns01 can now be configured for individual domains. Using PR from Jérôme Billiras (@bilhackmac) and adding test case and fixing proper working - Fixed a bug found by Jérôme Billiras (@bilhackmac) that caused the challenge teardown not being invoked as it should. *) mod_ldap: Avoid performance overhead of APR-util rebind cache for OpenLDAP 2.2+. PR 64414. [Joe Orton] *) mod_http2: new directive 'H2MaxDataFrameLen n' to limit the maximum amount of response body bytes put into a single HTTP/2 DATA frame. Setting this to 0 places no limit (but the max size allowed by the protocol is observed). The module, by default, tries to use the maximum size possible, which is somewhat around 16KB. This sets the maximum. When less response data is available, smaller frames will be sent. *) mod_md: fixed passing of the server environment variables to programs started via MDMessageCmd and MDChallengeDns01 on *nix system. See . [Stefan Eissing] *) mod_dav: Add DavBasePath directive to configure the repository root path. PR 35077. [Joe Orton] *) mod_alias: Add AliasPreservePath directive to map the full path after the alias in a location. [Graham Leggett] *) mod_alias: Add RedirectRelative to allow relative redirect targets to be issued as-is. [Eric Covener, Graham Leggett] *) core: Add formats %{z} and %{strftime-format} to ErrorLogFormat, and make sure that if the format is configured early enough it applies to every log line. PR 62161. [Yann Ylavic] *) mod_deflate: Add DeflateAlterETag to control how the ETag is modified. The 'NoChange' parameter mimics 2.2.x behavior. PR 45023, PR 39727. [Eric Covener] *) core: Optimize send_brigade_nonblocking(). [Yann Ylavic, Christophe Jaillet] *) mod_status: Remove duplicate keys "BusyWorkers" and "IdleWorkers". Resolve inconsistency between the previous two occurrences by counting workers in state SERVER_GRACEFUL no longer as busy, but instead in a new counter "GracefulWorkers" (or on HTML view as "workers gracefully restarting"). Also add the graceful counter as a new column to the existing HTML per process table for async MPMs. PR 63300. [Rainer Jung] Changes with Apache 2.4.57 *) mod_proxy: Check before forwarding that a nocanon path has not been rewritten with spaces during processing. [Yann Ylavic] *) mod_proxy: In case that AllowEncodedSlashes is set to NoDecode do not double encode encoded slashes in the URL sent by the reverse proxy to the backend. [Ruediger Pluem] *) mod_http2: fixed a crash during connection termination. See PR 66539. [Stefan Eissing] *) mod_rewrite: Fix a 2.4.56 regression for substitutions ending in a question mark. PR66547. [Eric Covener] *) mod_rewrite: Add "BCTLS" and "BNE" RewriteRule flags. Re-allow encoded characters on redirections without the "NE" flag. [Yann Ylavic, Eric Covener] *) mod_proxy: Fix double encoding of the uri-path of the request forwarded to the origin server, when using mapping=encoded|servlet. [Yann Ylavic] *) mod_mime: Do not match the extention against possible query string parameters in case ProxyPass was used with the nocanon option. [Ruediger Pluem] Changes with Apache 2.4.56 *) SECURITY: CVE-2023-27522: Apache HTTP Server: mod_proxy_uwsgi HTTP response splitting (cve.mitre.org) HTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.55. Special characters in the origin response header can truncate/split the response forwarded to the client. Credits: Dimas Fariski Setyawan Putra (nyxsorcerer) *) SECURITY: CVE-2023-25690: HTTP request splitting with mod_rewrite and mod_proxy (cve.mitre.org) Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack. Configurations are affected when mod_proxy is enabled along with some form of RewriteRule or ProxyPassMatch in which a non-specific pattern matches some portion of the user-supplied request-target (URL) data and is then re-inserted into the proxied request-target using variable substitution. For example, something like: RewriteEngine on RewriteRule "^/here/(.*)" "http://example.com:8080/elsewhere?$1"; [P] ProxyPassReverse /here/ http://example.com:8080/ Request splitting/smuggling could result in bypass of access controls in the proxy server, proxying unintended URLs to existing origin servers, and cache poisoning. Credits: Lars Krapf of Adobe *) rotatelogs: Add -T flag to allow subsequent rotated logfiles to be truncated without the initial logfile being truncated. [Eric Covener] *) mod_ldap: LDAPConnectionPoolTTL should accept negative values in order to allow connections of any age to be reused. Up to now, a negative value was handled as an error when parsing the configuration file. PR 66421. [nailyk , Christophe Jaillet] *) mod_proxy_ajp: Report an error if the AJP backend sends an invalid number of headers. [Ruediger Pluem] *) mod_md: - Enabling ED25519 support and certificate transparency information when building with libressl v3.5.0 and newer. Thanks to Giovanni Bechis. - MDChallengeDns01 can now be configured for individual domains. Thanks to Jérôme Billiras (@bilhackmac) for the initial PR. - Fixed a bug found by Jérôme Billiras (@bilhackmac) that caused the challenge teardown not being invoked as it should. [Stefan Eissing] *) mod_http2: client resets of HTTP/2 streams led to unwanted 500 errors reported in access logs and error documents. The processing of the reset was correct, only unneccesary reporting was caused. [Stefan Eissing] *) mod_proxy_uwsgi: Stricter backend HTTP response parsing/validation. [Yann Ylavic] Changes with Apache 2.4.55 *) SECURITY: CVE-2022-37436: Apache HTTP Server: mod_proxy prior to 2.4.55 allows a backend to trigger HTTP response splitting (cve.mitre.org) Prior to Apache HTTP Server 2.4.55, a malicious backend can cause the response headers to be truncated early, resulting in some headers being incorporated into the response body. If the later headers have any security purpose, they will not be interpreted by the client. Credits: Dimas Fariski Setyawan Putra (@nyxsorcerer) *) SECURITY: CVE-2022-36760: Apache HTTP Server: mod_proxy_ajp Possible request smuggling (cve.mitre.org) Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in mod_proxy_ajp of Apache HTTP Server allows an attacker to smuggle requests to the AJP server it forwards requests to. This issue affects Apache HTTP Server Apache HTTP Server 2.4 version 2.4.54 and prior versions. Credits: ZeddYu_Lu from Qi'anxin Research Institute of Legendsec at Qi'anxin Group *) SECURITY: CVE-2006-20001: mod_dav out of bounds read, or write of zero byte (cve.mitre.org) A carefully crafted If: request header can cause a memory read, or write of a single zero byte, in a pool (heap) memory location beyond the header value sent. This could cause the process to crash. This issue affects Apache HTTP Server 2.4.54 and earlier. *) mod_dav: Open the lock database read-only when possible. PR 36636 [Wilson Felipe , manu] *) mod_proxy_http2: apply the standard httpd content type handling to responses from the backend, as other proxy modules do. Fixes PR 66391. Thanks to Jérôme Billiras for providing the patch. [Stefan Eissing] *) mod_dav: mod_dav overrides dav_fs response on PUT failure. PR 35981 [Basant Kumar Kukreja , Alejandro Alvarez ] *) mod_proxy_hcheck: Honor worker timeout settings. [Yann Ylavic] *) mod_http2: version 2.0.11 of the module, synchronizing changes with the gitgub version. This is a partial rewrite of how connections and streams are handled. - an APR pollset and pipes (where supported) are used to monitor the main connection and react to IO for request/response handling. This replaces the stuttered timed waits of earlier versions. - H2SerializeHeaders directive still exists, but has no longer an effect. - Clients that seemingly misbehave still get less resources allocated, but ongoing requests are no longer disrupted. - Fixed an issue since 1.15.24 that "Server" headers in proxied requests were overwritten instead of preserved. [PR by @daum3ns] - A regression in v1.15.24 was fixed that could lead to httpd child processes not being terminated on a graceful reload or when reaching MaxConnectionsPerChild. When unprocessed h2 requests were queued at the time, these could stall. See #212. - Improved information displayed in 'server-status' for H2 connections when Extended Status is enabled. Now one can see the last request that IO operations happened on and transferred IO stats are updated as well. - When reaching server limits, such as MaxRequestsPerChild, the HTTP/2 connection send a GOAWAY frame much too early on new connections, leading to invalid protocol state and a client failing the request. See PR65731 at . The module now initializes the HTTP/2 protocol correctly and allows the client to submit one request before the shutdown via a GOAWAY frame is being announced. - :scheme pseudo-header values, not matching the connection scheme, are forwarded via absolute uris to the http protocol processing to preserve semantics of the request. Checks on combinations of pseudo-headers values/absence have been added as described in RFC 7540. Fixes #230. - A bug that prevented trailers (e.g. HEADER frame at the end) to be generated in certain cases was fixed. See #233 where it prevented gRPC responses to be properly generated. - Request and response header values are automatically stripped of leading and trialing space/tab characters. This is equivalent behaviour to what Apache httpd's http/1.1 parser does. The checks for this in nghttp2 v1.50.0+ are disabled. - Extensive testing in production done by Alessandro Bianchi (@alexskynet) on the v2.0.x versions for stability. Many thanks! *) mod_proxy_http2: fixed #235 by no longer forwarding 'Host:' header when request ':authority' is known. Improved test case that did not catch that the previous 'fix' was incorrect. *) mod_proxy_hcheck: hcmethod now allows for HTTP/1.1 requests using GET11, HEAD11 and/or OPTIONS11. [Jim Jagielski] *) mod_proxy: The AH03408 warning for a forcibly closed backend connection is now logged at INFO level. [Yann Ylavic] *) mod_ssl: When dumping the configuration, the existence of certificate/key files is no longer tested. [Joe Orton] *) mod_authn_core: Add expression support to AuthName and AuthType. [Graham Leggett] *) mod_ssl: when a proxy connection had handled a request using SSL, an error was logged when "SSLProxyEngine" was only configured in the location/proxy section and not the overall server. The connection continued to work, the error log was in error. Fixed PR66190. [Stefan Eissing] *) mod_proxy_hcheck: Re-enable workers in standard ERROR state. PR 66302. [Alessandro Cavaliere ] *) mod_proxy_hcheck: Detect AJP/CPING support correctly. PR 66300. [Alessandro Cavaliere ] *) mod_http2: Export mod_http2.h as public header. [Stefan Eissing] *) mod_md: a new directive `MDStoreLocks` can be used on cluster setups with a shared file system for `MDStoreDir` to order activation of renewed certificates when several cluster nodes are restarted at the same time. Store locks are not enabled by default. Restored curl_easy cleanup behaviour from v2.4.14 and refactored the use of curl_multi for OCSP requests to work with that. Fixes . *) core: Avoid an overflow on large inputs in ap_is_matchexp. PR 66033 [Ruediger Pluem] *) mod_heartmonitor: Allow "HeartbeatMaxServers 0" to use file based storage instead of slotmem. Needed after setting HeartbeatMaxServers default to the documented value 10 in 2.4.54. PR 66131. [Jérôme Billiras] *) mod_dav: DAVlockDiscovery option to disable WebDAV lock discovery This is a game changer for performances if client use PROPFIND a lot, PR 66313. [Emmanuel Dreyfus] Changes with Apache 2.4.54 *) SECURITY: CVE-2022-31813: mod_proxy X-Forwarded-For dropped by hop-by-hop mechanism (cve.mitre.org) Apache HTTP Server 2.4.53 and earlier may not send the X-Forwarded-* headers to the origin server based on client side Connection header hop-by-hop mechanism. This may be used to bypass IP based authentication on the origin server/application. Credits: The Apache HTTP Server project would like to thank Gaetan Ferry (Synacktiv) for reporting this issue *) SECURITY: CVE-2022-30556: Information Disclosure in mod_lua with websockets (cve.mitre.org) Apache HTTP Server 2.4.53 and earlier may return lengths to applications calling r:wsread() that point past the end of the storage allocated for the buffer. Credits: The Apache HTTP Server project would like to thank Ronald Crane (Zippenhop LLC) for reporting this issue *) SECURITY: CVE-2022-30522: mod_sed denial of service (cve.mitre.org) If Apache HTTP Server 2.4.53 is configured to do transformations with mod_sed in contexts where the input to mod_sed may be very large, mod_sed may make excessively large memory allocations and trigger an abort. Credits: This issue was found by Brian Moussalli from the JFrog Security Research team *) SECURITY: CVE-2022-29404: Denial of service in mod_lua r:parsebody (cve.mitre.org) In Apache HTTP Server 2.4.53 and earlier, a malicious request to a lua script that calls r:parsebody(0) may cause a denial of service due to no default limit on possible input size. Credits: The Apache HTTP Server project would like to thank Ronald Crane (Zippenhop LLC) for reporting this issue *) SECURITY: CVE-2022-28615: Read beyond bounds in ap_strcmp_match() (cve.mitre.org) Apache HTTP Server 2.4.53 and earlier may crash or disclose information due to a read beyond bounds in ap_strcmp_match() when provided with an extremely large input buffer. While no code distributed with the server can be coerced into such a call, third-party modules or lua scripts that use ap_strcmp_match() may hypothetically be affected. Credits: The Apache HTTP Server project would like to thank Ronald Crane (Zippenhop LLC) for reporting this issue *) SECURITY: CVE-2022-28614: read beyond bounds via ap_rwrite() (cve.mitre.org) The ap_rwrite() function in Apache HTTP Server 2.4.53 and earlier may read unintended memory if an attacker can cause the server to reflect very large input using ap_rwrite() or ap_rputs(), such as with mod_luas r:puts() function. Credits: The Apache HTTP Server project would like to thank Ronald Crane (Zippenhop LLC) for reporting this issue *) SECURITY: CVE-2022-28330: read beyond bounds in mod_isapi (cve.mitre.org) Apache HTTP Server 2.4.53 and earlier on Windows may read beyond bounds when configured to process requests with the mod_isapi module. Credits: The Apache HTTP Server project would like to thank Ronald Crane (Zippenhop LLC) for reporting this issue *) SECURITY: CVE-2022-26377: mod_proxy_ajp: Possible request smuggling (cve.mitre.org) Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in mod_proxy_ajp of Apache HTTP Server allows an attacker to smuggle requests to the AJP server it forwards requests to. This issue affects Apache HTTP Server Apache HTTP Server 2.4 version 2.4.53 and prior versions. Credits: Ricter Z @ 360 Noah Lab *) mod_ssl: SSLFIPS compatible with OpenSSL 3.0. PR 66063. [Petr Sumbera , Yann Ylavic] *) mod_proxy_http: Avoid 417 responses for non forwardable 100-continue. PR 65666. [Yann Ylavic] *) mod_md: a bug was fixed that caused very large MDomains with the combined DNS names exceeding ~7k to fail, as request bodies would contain partially wrong data from uninitialized memory. This would have appeared as failure in signing-up/renewing such configurations. [Stefan Eissing, Ronald Crane (Zippenhop LLC)] *) mod_proxy_http: Avoid 417 responses for non forwardable 100-continue. PR 65666. [Yann Ylavic] *) MPM event: Restart children processes killed before idle maintenance. PR 65769. [Yann Ylavic, Ruediger Pluem] *) ab: Allow for TLSv1.3 when the SSL library supports it. [abhilash1232 gmail.com, xiaolongx.jiang intel.com, Yann Ylavic] *) core: Disable TCP_NOPUSH optimization on OSX since it might introduce transmission delays. PR 66019. [Yann Ylavic] *) MPM event: Fix accounting of active/total processes on ungraceful restart, PR 66004 (follow up to PR 65626 from 2.4.52). [Yann Ylavic] *) core: make ap_escape_quotes() work correctly on strings with more than MAX_INT/2 characters, counting quotes double. Credit to for finding this. [Stefan Eissing] *) mod_md: the `MDCertificateAuthority` directive can take more than one URL/name of an ACME CA. This gives a failover for renewals when several consecutive attempts to get a certificate failed. A new directive was added: `MDRetryDelay` sets the delay of retries. A new directive was added: `MDRetryFailover` sets the number of errored attempts before an alternate CA is selected for certificate renewals. [Stefan Eissing] *) mod_http2: remove unused and insecure code. Fixes PR66037. Thanks to Ronald Crane (Zippenhop LLC) for reporting this. [Stefan Eissing] *) mod_proxy: Add backend port to log messages to ease identification of involved service. [Rainer Jung] *) mod_http2: removing unscheduling of ongoing tasks when connection shows potential abuse by a client. This proved counter-productive and the abuse detection can false flag requests using server-side-events. Fixes . [Stefan Eissing] *) mod_md: Implement full auto status ("key: value" type status output). Especially not only status summary counts for certificates and OCSP stapling but also lists. Auto status format is similar to what was used for mod_proxy_balancer. [Rainer Jung] *) mod_md: fixed a bug leading to failed transfers for OCSP stapling information when more than 6 certificates needed updates in the same run. [Stefan Eissing] *) mod_proxy: Set a status code of 502 in case the backend just closed the connection in reply to our forwarded request. [Ruediger Pluem] *) mod_md: a possible NULL pointer deref was fixed in the JSON code for persisting time periods (start+end). Fixes #282 on mod_md's github. Thanks to @marcstern for finding this. [Stefan Eissing] *) mod_heartmonitor: Set the documented default value "10" for HeartbeatMaxServers instead of "0". With "0" no shared memory slotmem was initialized. [Rainer Jung] *) mod_md: added support for managing certificates via a local tailscale daemon for users of that secure networking. This gives trusted certificates for tailscale assigned domain names in the *.ts.net space. [Stefan Eissing] *) core: Change default value of LimitRequestBody from 0 (unlimited) to 1GB. [Eric Covener] Changes with Apache 2.4.53 *) SECURITY: CVE-2022-23943: mod_sed: Read/write beyond bounds (cve.mitre.org) Out-of-bounds Write vulnerability in mod_sed of Apache HTTP Server allows an attacker to overwrite heap memory with possibly attacker provided data. This issue affects Apache HTTP Server 2.4 version 2.4.52 and prior versions. Credits: Ronald Crane (Zippenhop LLC) *) SECURITY: CVE-2022-22721: core: Possible buffer overflow with very large or unlimited LimitXMLRequestBody (cve.mitre.org) If LimitXMLRequestBody is set to allow request bodies larger than 350MB (defaults to 1M) on 32 bit systems an integer overflow happens which later causes out of bounds writes. This issue affects Apache HTTP Server 2.4.52 and earlier. Credits: Anonymous working with Trend Micro Zero Day Initiative *) SECURITY: CVE-2022-22720: HTTP request smuggling vulnerability in Apache HTTP Server 2.4.52 and earlier (cve.mitre.org) Apache HTTP Server 2.4.52 and earlier fails to close inbound connection when errors are encountered discarding the request body, exposing the server to HTTP Request Smuggling Credits: James Kettle *) SECURITY: CVE-2022-22719: mod_lua Use of uninitialized value of in r:parsebody (cve.mitre.org) A carefully crafted request body can cause a read to a random memory area which could cause the process to crash. This issue affects Apache HTTP Server 2.4.52 and earlier. Credits: Chamal De Silva *) core: Make sure and check that LimitXMLRequestBody fits in system memory. [Ruediger Pluem, Yann Ylavic] *) core: Simpler connection close logic if discarding the request body fails. [Yann Ylavic, Ruediger Pluem] *) mod_http2: preserve the port number given in a HTTP/1.1 request that was Upgraded to HTTP/2. Fixes PR65881. [Stefan Eissing] *) mod_proxy: Allow for larger worker name. PR 53218. [Yann Ylavic] *) dbm: Split the loading of a dbm driver from the opening of a dbm file. When an attempt to load a dbm driver fails, log clearly which driver triggered the error (not "default"), and what the error was. [Graham Leggett] *) mod_proxy: Use the maxium of front end and backend timeouts instead of the minimum when tunneling requests (websockets, CONNECT requests). Backend timeouts can be configured more selectively (per worker if needed) as front end timeouts and typically the backend timeouts reflect the application requirements better. PR 65886 [Ruediger Pluem] *) ap_regex: Use Thread Local Storage (TLS) to recycle ap_regexec() buffers when an efficient TLS implementation is available. [Yann Ylavic] *) core, mod_info: Add compiled and loaded PCRE versions to version number display. [Rainer Jung] *) mod_md: do not interfere with requests to /.well-known/acme-challenge/ resources if challenge type 'http-01' is not configured for a domain. Fixes . [Stefan Eissing] *) mod_dav: Fix regression when gathering properties which could lead to huge memory consumption proportional to the number of resources. [Evgeny Kotkov, Ruediger Pluem] *) Support pcre2 (10.x) library in place of the now end-of-life pcre (8.x) for regular expression evaluation. This depends on locating pcre2-config. [William Rowe, Petr Pisar , Rainer Jung] *) Add the ldap function to the expression API, allowing LDAP filters and distinguished names based on expressions to be escaped correctly to guard against LDAP injection. [Graham Leggett] *) mod_md: the status description in MDomain's JSON, exposed in the md-status handler (if configured) did sometimes not carry the correct message when certificates needed renew. [Stefan Eissing] *) mpm_event: Fix a possible listener deadlock on heavy load when restarting and/or reaching MaxConnectionsPerChild. PR 65769. [Yann Ylavic] Changes with Apache 2.4.52 *) SECURITY: CVE-2021-44790: Possible buffer overflow when parsing multipart content in mod_lua of Apache HTTP Server 2.4.51 and earlier (cve.mitre.org) A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the vulnerability though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier. Credits: Chamal *) SECURITY: CVE-2021-44224: Possible NULL dereference or SSRF in forward proxy configurations in Apache HTTP Server 2.4.51 and earlier (cve.mitre.org) A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included). Credits: 漂亮鼠 TengMA(@Te3t123) *) http: Enforce that fully qualified uri-paths not to be forward-proxied have an http(s) scheme, and that the ones to be forward proxied have a hostname, per HTTP specifications. [Ruediger Pluem, Yann Ylavic] *) configure: OpenSSL detection will now use pkg-config data from .../lib64/ within the --with-ssl path. [Jean-Frederic Clere] *) mod_proxy_connect, mod_proxy: Do not change the status code after we already sent it to the client. [Ruediger Pluem] *) mod_http: Correctly sent a 100 Continue status code when sending an interim response as result of an Expect: 100-Continue in the request and not the current status code of the request. PR 65725 [Ruediger Pluem] *) mod_dav: Some DAV extensions, like CalDAV, specify both document elements and property elements that need to be taken into account when generating a property. The document element and property element are made available in the dav_liveprop_elem structure by calling dav_get_liveprop_element(). [Graham Leggett] *) mod_dav: Add utility functions dav_validate_root_ns(), dav_find_child_ns(), dav_find_next_ns(), dav_find_attr_ns() and dav_find_attr() so that other modules get to play too. [Graham Leggett] *) mpm_event: Restart stopping of idle children after a load peak. PR 65626. [Yann Ylavic, Ruediger Pluem] *) mod_http2: fixes 2 regressions in server limit handling. 1. When reaching server limits, such as MaxRequestsPerChild, the HTTP/2 connection send a GOAWAY frame much too early on new connections, leading to invalid protocol state and a client failing the request. See PR65731. The module now initializes the HTTP/2 protocol correctly and allows the client to submit one request before the shutdown via a GOAWAY frame is being announced. 2. A regression in v1.15.24 was fixed that could lead to httpd child processes not being terminated on a graceful reload or when reaching MaxConnectionsPerChild. When unprocessed h2 requests were queued at the time, these could stall. See . [Stefan Eissing] *) mod_ssl: Add build support for OpenSSL v3. [Rainer Jung, Stefan Fritsch, Yann Ylavic, Stefan Eissing, Joe Orton, Giovanni Bechis] *) mod_proxy_connect: Honor the smallest of the backend or client timeout while tunneling. [Yann Ylavic] *) mod_proxy: SetEnv proxy-nohalfclose (or alike) allows to disable TCP half-close forwarding when tunneling protocols. [Yann Ylavic] *) core: Be safe with ap_lingering_close() called with a socket NULL-ed by a third-party module. PR 65627. [acmondor , Yann Ylavic] *) mod_md: Fix memory leak in case of failures to load the private key. PR 65620 [ Filipe Casal ] *) mod_md: adding v2.4.8 with the following changes - Added support for ACME External Account Binding (EAB). Use the new directive `MDExternalAccountBinding` to provide the server with the value for key identifier and hmac as provided by your CA. While working on some servers, EAB handling is not uniform across CAs. First tests with a Sectigo Certificate Manager in demo mode are successful. But ZeroSSL, for example, seems to regard EAB values as a one-time-use-only thing, which makes them fail if you create a seconde account or retry the creation of the first account with the same EAB. - The directive 'MDCertificateAuthority' now checks if its parameter is a http/https url or one of a set of known names. Those are 'LetsEncrypt', 'LetsEncrypt-Test', 'Buypass' and 'Buypass-Test' for now and they are not case-sensitive. The default of LetsEncrypt is unchanged. - `MDContactEmail` can now be specified inside a `` section. - Treating 401 HTTP status codes for orders like 403, since some ACME servers seem to prefer that for accessing oders from other accounts. - When retrieving certificate chains, try to read the response even if the HTTP Content-Type is unrecognized. - Fixed a bug that reset the error counter of a certificate renewal and prevented the increasing delays in further attempts. - Fixed the renewal process giving up every time on an already existing order with some invalid domains. Now, if such are seen in a previous order, a new order is created for a clean start over again. See - Fixed a mixup in md-status handler when static certificate files and renewal was configured at the same time. *) mod_md: values for External Account Binding (EAB) can now also be configured to be read from a separate JSON file. This allows to keep server configuration permissions world readable without exposing secrets. [Stefan Eissing] *) mod_proxy_uwsgi: Remove duplicate slashes at the beginning of PATH_INFO. PR 65616. [Ruediger Pluem] Changes with Apache 2.4.51 *) SECURITY: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773) (cve.mitre.org) It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased paths, this could allow for remote code execution. This issue only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions. Credits: Reported by Juan Escobar from Dreamlab Technologies, Fernando Muñoz from NULL Life CTF Team, and Shungo Kumasaka *) core: Add ap_unescape_url_ex() for better decoding control, and deprecate unused AP_NORMALIZE_DROP_PARAMETERS flag. [Yann Ylavic, Ruediger Pluem, Stefan Eissing, Joe Orton] Changes with Apache 2.4.50 *) SECURITY: CVE-2021-41773: Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49 (cve.mitre.org) A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the expected document root. If files outside of the document root are not protected by "require all denied" these requests can succeed. Additionally this flaw could leak the source of interpreted files like CGI scripts. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. Credits: This issue was reported by Ash Daulton along with the cPanel Security Team *) SECURITY: CVE-2021-41524: null pointer dereference in h2 fuzzing (cve.mitre.org) While fuzzing the 2.4.49 httpd, a new null pointer dereference was detected during HTTP/2 request processing, allowing an external source to DoS the server. This requires a specially crafted request. The vulnerability was recently introduced in version 2.4.49. No exploit is known to the project. Credits: Apache httpd team would like to thank LI ZHI XIN from NSFocus Security Team for reporting this issue. *) core: AP_NORMALIZE_DECODE_UNRESERVED should normalize the second dot in the uri-path when it's preceded by a dot. [Yann Ylavic] *) mod_md: when MDMessageCmd for a 'challenge-setup::' fails (!= 0 exit), the renewal process is aborted and an error is reported for the MDomain. This provides scripts that distribute information in a cluster to abort early with bothering an ACME server to validate a dns name that will not work. The common retry logic will make another attempt in the future, as with other failures. Fixed a bug when adding private key specs to an already working MDomain, see . [Stefan Eissing] *) mod_proxy: Handle UDS URIs with empty hostname ("unix:///...") as if they had no hostname ("unix:/..."). [Yann Ylavic] *) mod_md: fixed a bug in handling multiple parallel OCSP requests. These could run into an assertion which terminated (and restarted) the child process where the task was running. Eventually, all OCSP responses were collected, but not in the way that things are supposed to work. See also . The bug was possibly triggered when more than one OCSP status needed updating at the same time. For example for several renewed certificates after a server reload. *) mod_rewrite: Fix UDS ("unix:") scheme for [P] rules. PR 57691 + 65590. [Janne Peltonen ] *) event mpm: Correctly count active child processes in parent process if child process dies due to MaxConnectionsPerChild. PR 65592 [Ruediger Pluem] *) mod_http2: when a server is restarted gracefully, any idle h2 worker threads are shut down immediately. Also, change OpenSSL API use for deprecations in OpenSSL 3.0. Adds all other, never proposed code changes to make a clean sync of http2 sources. [Stefan Eissing] *) mod_dav: Correctly handle errors returned by dav providers on REPORT requests. [Ruediger Pluem] *) core: do not install core input/output filters on secondary connections. [Stefan Eissing] *) core: Add ap_pre_connection() as a wrapper to ap_run_pre_connection() and use it to prevent that failures in running the pre_connection hook cause crashes afterwards. [Ruediger Pluem] *) mod_speling: Add CheckBasenameMatch PR 44221. [Christophe Jaillet] Changes with Apache 2.4.49 *) SECURITY: CVE-2021-40438 (cve.mitre.org) mod_proxy: Server Side Request Forgery (SSRF) vulnerability [Yann Ylavic] *) SECURITY: CVE-2021-39275 (cve.mitre.org) core: ap_escape_quotes buffer overflow *) SECURITY: CVE-2021-36160 (cve.mitre.org) mod_proxy_uwsgi: Out of bound read vulnerability [Yann Ylavic] *) SECURITY: CVE-2021-34798 (cve.mitre.org) core: null pointer dereference on malformed request *) SECURITY: CVE-2021-33193 (cve.mitre.org) mod_http2: Request splitting vulnerability with mod_proxy [Stefan Eissing] *) core/mod_proxy/mod_ssl: Adding `outgoing` flag to conn_rec, indicating a connection is initiated by the server to somewhere, in contrast to incoming connections from clients. Adding 'ap_ssl_bind_outgoing()` function that marks a connection as outgoing and is used by mod_proxy instead of the previous optional function `ssl_engine_set`. This enables other SSL module to secure proxy connections. The optional functions `ssl_engine_set`, `ssl_engine_disable` and `ssl_proxy_enable` are now provided by the core to have backward compatibility with non-httpd modules that might use them. mod_ssl itself no longer registers these functions, but keeps them in its header for backward compatibility. The core provided optional function wrap any registered function like it was done for `ssl_is_ssl`. [Stefan Eissing] *) mod_ssl: Support logging private key material for use with wireshark via log file given by SSLKEYLOGFILE environment variable. Requires OpenSSL 1.1.1. PR 63391. [Joe Orton] *) mod_proxy: Do not canonicalize the proxied URL when both "nocanon" and "ProxyPassInterpolateEnv On" are configured. PR 65549. [Joel Self ] *) mpm_event: Fix children processes possibly not stopped on graceful restart. PR 63169. [Joel Self ] *) mod_proxy: Fix a potential infinite loop when tunneling Upgrade(d) protocols from mod_proxy_http, and a timeout triggering falsely when using mod_proxy_wstunnel, mod_proxy_connect or mod_proxy_http with upgrade= setting. PRs 65521 and 65519. [Yann Ylavic] *) mod_unique_id: Reduce the time window where duplicates may be generated PR 65159 [Christophe Jaillet] *) mpm_prefork: Block signals for child_init hooks to prevent potential threads created from there to catch MPM's signals. [Ruediger Pluem, Yann Ylavic] *) Revert "mod_unique_id: Fix potential duplicated ID generation under heavy load. PR 65159" added in 2.4.47. This causes issue on Windows. [Christophe Jaillet] *) mod_proxy_uwsgi: Fix PATH_INFO setting for generic worker. [Yann Ylavic] *) mod_md: Certificate/keys pairs are verified as matching before a renewal is accepted as successful or a staged renewal is replacing the existing certificates. This avoid potential mess ups in the md store file system to render the active certificates non-working. [@mkauf] *) mod_proxy: Faster unix socket path parsing in the "proxy:" URL. [Yann Ylavic] *) mod_ssl: tighten the handling of ALPN for outgoing (proxy) connections. If ALPN protocols are provided and sent to the remote server, the received protocol selected is inspected and checked for a match. Without match, the peer handshake fails. An exception is the proposal of "http/1.1" where it is accepted if the remote server did not answer ALPN with a selected protocol. This accommodates for hosts that do not observe/support ALPN and speak http/1.x be default. *) mod_proxy: Fix possible reuse/merging of Proxy(Pass)Match worker instances with others when their URLs contain a '$' substitution. PR 65419 + 65429. [Yann Ylavic] *) mod_dav: Add method_precondition hook. WebDAV extensions define conditions that must exist before a WebDAV method can be executed. This hook allows a WebDAV extension to verify these preconditions. [Graham Leggett] *) Add hooks deliver_report and gather_reports to mod_dav.h. Allows other modules apart from versioning implementations to handle the REPORT method. [Graham Leggett] *) Add dav_get_provider(), dav_open_lockdb(), dav_close_lockdb() and dav_get_resource() to mod_dav.h. [Graham Leggett] *) core: fix ap_escape_quotes substitution logic. [Eric Covener] *) core/mpm: add hook 'child_stopping` that gets called when the MPM is stopping a child process. The additional `graceful` parameter allows registered hooks to free resources early during a graceful shutdown. [Yann Ylavic, Stefan Eissing] *) mod_proxy: Fix icomplete initialization of BalancerMember(s) from the balancer-manager, which can lead to a crash. [Yann Ylavic] *) mpm_event: Fix graceful stop/restart of children processes if connections are in lingering close for too long. [Yann Ylavic] *) mod_md: fixed a potential null pointer dereference if ACME/OCSP server returned 2xx responses without content type. Reported by chuangwen. [chuangwen, Stefan Eissing] *) mod_md: - Domain names in `` can now appear in quoted form. - Fixed a failure in ACME challenge selection that aborted further searches when the tls-alpn-01 method did not seem to be suitable. - Changed the tls-alpn-01 setup to only become unsuitable when none of the dns names showed support for a configured 'Protocols ... acme-tls/1'. This allows use of tls-alpn-01 for dns names that are not mapped to a VirtualHost. [Stefan Eissing] *) Add CPING to health check logic. [Jean-Frederic Clere] *) core: Split ap_create_request() from ap_read_request(). [Graham Leggett] *) core, h2: common ap_parse_request_line() and ap_check_request_header() code. [Yann Ylavic] *) core: Add StrictHostCheck to allow unconfigured hostnames to be rejected. [Eric Covener] *) htcacheclean: Improve help messages. [Christophe Jaillet] Changes with Apache 2.4.48 *) SECURITY: CVE-2021-31618 (cve.mitre.org) mod_http2: Fix a potential NULL pointer dereference [Ivan Zhakov] *) mod_proxy_wstunnel: Add ProxyWebsocketFallbackToProxyHttp to opt-out the fallback to mod_proxy_http for WebSocket upgrade and tunneling. [Yann Ylavic] *) mod_proxy: Fix flushing of THRESHOLD_MIN_WRITE data while tunneling. PR 65294. [Yann Ylavic] *) core: Fix a regression that stripped the ETag header from 304 responses. PR 61820 [Ruediger Pluem, Roy T. Fielding] *) core: Adding SSL related inquiry functions to the server API. These function are always available, even when no module providing SSL is loaded. They provide their own "shadowing" implementation for the optional functions of similar name that mod_ssl and impersonators of mod_ssl provide. This enables loading of several SSL providing modules when all but one of them registers itself into the new hooks. Two old-style SSL modules will not work, as they replace the others optional functions with their own. Modules using the old-style optional functions will continue to work as core supplies its own versions of those. The following has been added so far: - ap_ssl_conn_is_ssl() to query if a connection is using SSL. - ap_ssl_var_lookup() to query SSL related variables for a server/connection/request. - Hooks for 'ssl_conn_is_ssl' and 'ssl_var_lookup' where modules providing SSL can install their own value supplying functions. - ap_ssl_add_cert_files() to enable other modules like mod_md to provide certificate and keys for an SSL module like mod_ssl. - ap_ssl_add_fallback_cert_files() to enable other modules like mod_md to provide a fallback certificate in case no 'proper' certificate is available for an SSL module like mod_ssl. - ap_ssl_answer_challenge() to enable other modules like mod_md to provide a certificate as used in the RFC 8555 'tls-alpn-01' challenge for the ACME protocol for an SSL module like mod_ssl. The function and its hook provide PEM encoded data instead of file names. - Hooks for 'ssl_add_cert_files', 'ssl_add_fallback_cert_files' and 'ssl_answer_challenge' where modules like mod_md can provide providers to the above mentioned functions. - These functions reside in the new 'http_ssl.h' header file. [Stefan Eissing] *) core/mod_ssl/mod_md: adding OCSP response provisioning as core feature. This allows modules to access and provide OCSP response data without being tied of each other. The data is exchanged in standard, portable formats (PEM encoded certificates and DER encoded responses), so that the actual SSL/crypto implementations used by the modules are independant of each other. Registration and retrieval happen in the context of a server (server_rec) which modules may use to decide if they are configured for this or not. The area of changes: 1. core: defines 2 functions in include/http_ssl.h, so that modules may register a certificate, together with its issuer certificate for OCSP response provisioning and ask for current response data (DER bytes) later. Also, 2 hooks are defined that allow modules to implement this OCSP provisioning. 2. mod_ssl uses the new functions, in addition to what it did already, to register its certificates this way. If no one is interested in providing OCSP, it falls back to its own (if configured) stapling implementation. 3. mod_md registers itself at the core hooks for OCSP provisioning. Depending on configuration, it will accept registrations of its own certificates only, all certificates or none. [Stefan Eissing] *) mod_md: v2.4.0 with improvements and bugfixes - MDPrivateKeys allows the specification of several types. Beside "RSA" plus optional key lengths elliptic curves can be configured. This means you can have multiple certificates for a Managed Domain with different key types. With ```MDPrivateKeys secp384r1 rsa2048``` you get one ECDSA and one RSA certificate and all modern client will use the shorter ECDSA, while older client will get the RSA certificate. Many thanks to @tlhackque who pushed and helped on this. - Support added for MDomains consisting of a wildcard. Configuring ```MDomain *.host.net``` will match all virtual hosts matching that pattern and obtain one certificate for it (assuming you have 'dns-01' challenge support configured). Addresses #239. - Removed support for ACMEv1 servers. The only known installation used to be Let's Encrypt which has disabled that version more than a year ago for new accounts. - Andreas Ulm () implemented the ```renewing``` call to ```MDMessageCmd``` that can deny a certificate renewal attempt. This is useful in clustered installations, as discussed in #233). - New event ```challenge-setup::```, triggered when the challenge data for a domain has been created. This is invoked before the ACME server is told to check for it. The type is one of the ACME challenge types. This is invoked for every DNS name in a MDomain. - The max delay for retries has been raised to daily (this is like all retries jittered somewhat to avoid repeats at fixed time of day). - Certain error codes reported by the ACME server that indicate a problem with the configured data now immediately switch to daily retries. For example: if the ACME server rejects a contact email or a domain name, frequent retries will most likely not solve the problem. But daily retries still make sense as there might be an error at the server and un-supervised certificate renewal is the goal. Refs #222. - Test case and work around for domain names > 64 octets. Fixes #227. When the first DNS name of an MD is longer than 63 octets, the certificate request will not contain a CN field, but leave it up to the CA to choose one. Currently, Lets Encrypt looks for a shorter name in the SAN list given and fails the request if none is found. But it is really up to the CA (and what browsers/libs accept here) and may change over the years. That is why the decision is best made at the CA. - Retry delays now have a random +/-[0-50]% modification applied to let retries from several servers spread out more, should they have been restarted at the same time of day. - Fixed several places where the 'badNonce' return code from an ACME server was not handled correctly. The test server 'pebble' simulates this behaviour by default and helps nicely in verifying this behaviour. Thanks, pebble! - Set the default `MDActivationDelay` to 0. This was confusing to users that new certificates were deemed not usably before a day of delay. When clocks are correct, using a new certificate right away should not pose a problem. - When handling ACME authorization resources, the module no longer requires the server to return a "Location" header, as was necessary in ACMEv1. Fixes #216. - Fixed a theoretical uninitialized read when testing for JSON error responses from the ACME CA. Reported at . - ACME problem reports from CAs that include parameters in the Content-Type header are handled correctly. (Previously, the problem text would not be reported and retries could exceed CA limits.) - Account Update transactions to V2 CAs now use the correct POST-AS-GET method. Previously, an empty JSON object was sent - which apparently LE accepted, but others reject. [Stefan Eissing, @tlhackque, Andreas Ulm] Changes with Apache 2.4.47 *) SECURITY: CVE-2021-30641 (cve.mitre.org) Unexpected section matching with 'MergeSlashes OFF' *) SECURITY: CVE-2020-35452 (cve.mitre.org) mod_auth_digest: possible stack overflow by one nul byte while validating the Digest nonce. [Yann Ylavic] *) SECURITY: CVE-2021-26691 (cve.mitre.org) mod_session: Fix possible crash due to NULL pointer dereference, which could be used to cause a Denial of Service with a malicious backend server and SessionHeader. [Yann Ylavic] *) SECURITY: CVE-2021-26690 (cve.mitre.org) mod_session: Fix possible crash due to NULL pointer dereference, which could be used to cause a Denial of Service. [Yann Ylavic] *) SECURITY: CVE-2020-13950 (cve.mitre.org) mod_proxy_http: Fix possible crash due to NULL pointer dereference, which could be used to cause a Denial of Service. [Yann Ylavic] *) SECURITY: CVE-2020-13938 (cve.mitre.org) Windows: Prevent local users from stopping the httpd process [Ivan Zhakov] *) SECURITY: CVE-2019-17567 (cve.mitre.org) mod_proxy_wstunnel, mod_proxy_http: Handle Upgradable protocols end-to-end negotiation. [Yann Ylavic] *) mod_dav_fs: Improve logging output when failing to open files for writing. PR 64413. [Bingyu Shen ] *) mod_http2: Fixed a race condition that could lead to streams being aborted (RST to the client), although a response had been produced. [Stefan Eissing] *) mod_lua: Add support to Lua 5.4 [Joe Orton, Giovanni Bechis, Ruediger Pluem] *) MPM event/worker: Fix possible crash in child process on early signal delivery. PR 64533. [Ruediger Pluem] *) mod_http2: sync with github standalone version 1.15.17 - Log requests and sent the configured error response in case of early detected errors like too many or too long headers. [Ruediger Pluem] - new option 'H2OutputBuffering on/off' which controls the buffering of stream output. The default is on, which is the behaviour of older mod-h2 versions. When off, all bytes are made available immediately to the main connection for sending them out to the client. This fixes interop issues with certain flavours of gRPC, see also . [Stefan Eissing] *) mod_unique_id: Fix potential duplicated ID generation under heavy load. PR 65159 [Jonas Müntener , Christophe Jaillet] *) "[mod_dav_fs etag handling] should really honor the FileETag setting". - It now does. - Add "Digest" to FileETag directive, allowing a strong ETag to be generated using a file digest. - Add ap_make_etag_ex() and ap_set_etag_fd() to allow full control over ETag generation. - Add concept of "binary notes" to request_rec, allowing packed bit flags to be added to a request. - First binary note - AP_REQUEST_STRONG_ETAG - allows modules to force the ETag to a strong ETag to comply with RFC requirements, such as those mandated by various WebDAV extensions. [Graham Leggett] *) mod_proxy_http: Fix a possibly crash when the origin connection gets interrupted before completion. PR 64234. [Barnim Dzwillo , Ruediger Pluem] *) mod_ssl: Do not keep connections to OCSP responders alive when doing OCSP requests. PR 64135. [Ruediger Pluem] *) mod_ssl: Improve the coalescing filter to buffer into larger TLS records, and avoid revealing the HTTP header size via TLS record boundaries (for common response generators). [Joe Orton, Ruediger Pluem] *) mod_proxy_hcheck: Don't pile up health checks if the previous one did not finish before hcinterval. PR 63010. [Yann Ylavic] *) mod_session: Improve session parsing. [Yann Yalvic] *) mod_authnz_ldap: Prevent authentications with empty passwords for the initial bind to fail with status 500. [Ruediger Pluem] *) mod_proxy_fcgi: Honor "SetEnv proxy-sendcl" to forward a chunked Transfer-Encoding from the client, spooling the request body when needed to provide a Content-Length to the backend. PR 57087. [Yann Ylavic] *) mod_proxy: Improve tunneling loop to support half closed connections and pending data draining (for protocols like rsync). PR 61616. [Yann Ylavic] *) mod_proxy_wstunnel: Leave Upgrade requests handling to mod_proxy_http, allowing for (non-)Upgrade negotiation with the origin server. [Yann Ylavic] *) mod_proxy: Allow ProxyErrorOverride to be restricted to specific status codes. PR63628. [Martin Drößler ] *) core: Add ReadBufferSize, FlushMaxThreshold and FlushMaxPipelined directives. [Yann Ylavic] *) core: Ensure that aborted connections are logged as such. PR 62823 [Arnaud Grandville ] *) http: Allow unknown response status' lines returned in the form of "HTTP/x.x xxx Status xxx". [Yann Ylavic] *) mod_proxy_http: Fix 100-continue deadlock for spooled request bodies, leading to Request Timeout (408). PR 63855. [Yann Ylavic] *) core: Remove headers on 304 Not Modified as specified by RFC7234, as opposed to passing an explicit subset of headers. PR 61820. [Giovanni Bechis] *) mpm_event: Don't reset connections after lingering close, restoring prior to 2.4.28 behaviour. [Yann Ylavic] *) mpm_event: Kill connections in keepalive state only when there is no more workers available, not when the maximum number of connections is reached, restoring prior to 2.4.30 behaviour. [Yann Ylavic] *) mod_unique_id: Use base64url encoding for UNIQUE_ID variable, avoiding the use of '@'. PR 57044. [Michael Kaufmann ] *) mod_rewrite: Extend the [CO] (cookie) flag of RewriteRule to accept a SameSite attribute. [Eric Covener] *) mod_proxy: Add proxy check_trans hook. This allows proxy modules to decline request handling at early stage. *) mod_proxy_wstunnel: Decline requests without an Upgrade header so ws/wss can be enabled overlapping with later http/https. *) mod_http2: Log requests and sent the configured error response in case of early detected errors like too many or too long headers. [Ruediger Pluem, Stefan Eissing] *) mod_md: Lowered the required minimal libcurl version from 7.50 to 7.29 as proposed by . [Stefan Eissing] *) mod_ssl: Fix request body buffering with PHA in TLSv1.3. [Joe Orton] *) mod_proxy_uwsgi: Fix a crash when sending environment variables with no value. PR 64598 [Ruediger Pluem] *) mod_proxy: Recognize parameters from ProxyPassMatch workers with dollar substitution, such that they apply to the backend connection. Note that connection reuse is disabled by default to avoid compatibility issues. [Takashi Sato, Jan Kaluza, Eric Covener, Yann Ylavic, Jean-Frederic Clere] Changes with Apache 2.4.46 *) SECURITY: CVE-2020-11984 (cve.mitre.org) mod_proxy_uwsgi: Malicious request may result in information disclosure or RCE of existing file on the server running under a malicious process environment. [Yann Ylavic] *) SECURITY: CVE-2020-11993 (cve.mitre.org) mod_http2: when throttling connection requests, log statements where possibly made that result in concurrent, unsafe use of a memory pool. [Stefan Eissing] *) SECURITY: CVE-2020-9490 (cve.mitre.org) mod_http2: a specially crafted value for the 'Cache-Digest' header request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. [Stefan Eissing] *) mod_proxy_fcgi: Fix missing APLOGNO macro argument [Eric Covener, Christophe Jaillet] Changes with Apache 2.4.45 *) mod_http2: remove support for abandoned http-wg draft . [Stefan Eissing] Changes with Apache 2.4.44 *) mod_proxy_uwsgi: Error out on HTTP header larger than 16K (hard protocol limit). [Yann Ylavic] *) mod_http2: Fixes : "LimitRequestFields 0" now disables the limit, as documented. Fixes : Do not count repeated headers with same name against the field count limit. The are merged internally, as if sent in a single HTTP/1 line. [Stefan Eissing] *) mod_http2: Avoid segfaults in case of handling certain responses for already aborted connections. [Stefan Eissing, Ruediger Pluem] *) mod_http2: The module now handles master/secondary connections and has marked methods according to use. [Stefan Eissing] *) core: Drop an invalid Last-Modified header value coming from a FCGI/CGI script instead of replacing it with Unix epoch. [Yann Ylavic, Luca Toscano] *) Add support for strict content-length parsing through addition of ap_parse_strict_length() [Yann Ylavic] *) mod_proxy_fcgi: ProxyFCGISetEnvIf unsets variables when expression evaluates to false. PR64365. [Michael König ] *) mod_proxy_http: flush spooled request body in one go to avoid leaking (or long lived) temporary file. PR 64452. [Yann Ylavic] *) mod_ssl: Fix a race condition and possible crash when using a proxy client certificate (SSLProxyMachineCertificateFile). [Armin Abfalterer ] *) mod_ssl: Fix memory leak in stapling code. PR63687. [Stefan Eissing] *) mod_http2: Fixed regression that no longer set H2_STREAM_ID and H2_STREAM_TAG. PR64330 [Stefan Eissing] *) mod_http2: Fixed regression that caused connections to close when mod_reqtimeout was configured with a handshake timeout. Fixes gitub issue #196. [Stefan Eissing] *) mod_proxy_http2: the "ping" proxy parameter (see ) is now used when checking the liveliness of a new or reused h2 connection to the backend. With short durations, this makes load-balancing more responsive. The module will hold back requests until ping conditions are met, using features of the HTTP/2 protocol alone. [Ruediger Pluem, Stefan Eissing] *) core: httpd is no longer linked against -lsystemd if mod_systemd is enabled (and built as a DSO). [Rainer Jung] *) mod_proxy_http2: respect ProxyTimeout settings on backend connections while waiting on incoming data. [Ruediger Pluem, Stefan Eissing] Changes with Apache 2.4.43 *) mod_ssl: Fix memory leak of OCSP stapling response. [Yann Ylavic] Changes with Apache 2.4.42 *) SECURITY: CVE-2020-1934 (cve.mitre.org) mod_proxy_ftp: Use of uninitialized value with malicious backend FTP server. [Eric Covener] *) SECURITY: CVE-2020-1927 (cve.mitre.org) rewrite, core: Set PCRE_DOTALL flag by default to avoid unpredictable matches and substitutions with encoded line break characters. The fix for CVE-2019-10098 was not effective. [Ruediger Pluem] *) mod_proxy_http: Fix the forwarding of requests with content body when a balancer member is unavailable; the retry on the next member was issued with an empty body (regression introduced in 2.4.41). PR63891. [Yann Ylavic] *) core: Use a temporary file when writing the pid file, avoiding startup failure if an empty pidfile is left over from a previous crashed or aborted invocation of httpd. PR 63140. [Nicolas Carrier , Joe Orton] *) mod_http2: Fixes issue where mod_unique_id would generate non-unique request identifier under load, see . [Michael Kaufmann, Stefan Eissing] *) mod_proxy_hcheck: Allow healthcheck expressions to use %{Content-Type}. PR64140. [Renier Velazco ] *) mod_authz_groupfile: Drop AH01666 from loglevel "error" to "info". PR64172. *) mod_usertrack: Add CookieSameSite, CookieHTTPOnly, and CookieSecure to allow customization of the usertrack cookie. PR64077. [Prashant Keshvani , Eric Covener] *) mod_proxy_ajp: Add "secret" parameter to proxy workers to implement legacy AJP13 authentication. PR 53098. [Dmitry A. Bakshaev ] *) mpm_event: avoid possible KeepAliveTimeout off by -100 ms. [Eric Covener, Yann Ylavic] *) Add a config layout for OpenWRT. [Graham Leggett] *) Add support for cross compiling to apxs. If apxs is being executed from somewhere other than its target location, add that prefix to includes and library directories. Without this, apxs would fail to find config_vars.mk and exit. [Graham Leggett] *) mod_ssl: Disable client verification on ACME ALPN challenges. Fixes github issue mod_md#172 (https://github.com/icing/mod_md/issues/172). [Michael Kaufmann , Stefan Eissing] *) mod_ssl: use OPENSSL_init_ssl() to initialise OpenSSL on versions 1.1+. [Graham Leggett] *) mod_ssl: Support use of private keys and certificates from an OpenSSL ENGINE via PKCS#11 URIs in SSLCertificateFile/KeyFile. [Anderson Sasaki , Joe Orton] *) mod_md: - Prefer MDContactEmail directive to ServerAdmin for registration. New directive thanks to Timothe Litt (@tlhackque). - protocol check for pre-configured "tls-alpn-01" challenge has been improved. It will now check all matching virtual hosts for protocol support. Thanks to @mkauf. - Corrected a check when OCSP stapling was configured for hosts where the responsible MDomain is not clear, by Michal Karm Babacek (@Karm). - Softening the restrictions where mod_md configuration directives may appear. This should allow for use in and sections. If all possible variations lead to the configuration you wanted in the first place, is another matter. [Michael Kaufmann , Timothe Litt (@tlhackque), Michal Karm Babacek (@Karm), Stefan Eissing (@icing)] *) test: Added continuous testing with Travis CI. This tests various scenarios on Ubuntu with the full test suite. Architectures tested: amd64, s390x, ppc64le, arm64 The tests pass successfully. [Luca Toscano, Joe Orton, Mike Rumph, and others] *) core: Be stricter in parsing of Transfer-Encoding headers. [ZeddYu , Eric Covener] *) mod_ssl: negotiate the TLS protocol version per name based vhost configuration, when linked with OpenSSL-1.1.1 or later. The base vhost's SSLProtocol (from the first vhost declared on the IP:port) is now only relevant if no SSLProtocol is declared for the vhost or globally, otherwise the vhost or global value apply. [Yann Ylavic] *) mod_cgi, mod_cgid: Fix a memory leak in some error cases with large script output. PR 64096. [Joe Orton] *) config: Speed up graceful restarts by using pre-hashed command table. PR 64066. [Giovanni Bechis , Jim Jagielski] *) mod_systemd: New module providing integration with systemd. [Jan Kaluza] *) mod_lua: Add r:headers_in_table, r:headers_out_table, r:err_headers_out_table, r:notes_table, r:subprocess_env_table as read-only native table alternatives that can be iterated over. [Eric Covener] *) mod_http2: Fixed rare cases where a h2 worker could deadlock the main connection. [Yann Ylavic, Stefan Eissing] *) mod_lua: Accept nil assignments to the exposed tables (r.subprocess_env, r.headers_out, etc) to remove the key from the table. PR63971. [Eric Covener] *) mod_http2: Fixed interaction with mod_reqtimeout. A loaded mod_http2 was disabling the ssl handshake timeouts. Also, fixed a mistake of the last version that made `H2Direct` always `on`, regardless of configuration. Found and reported by and . [Stefan Eissing] *) mod_http2: Multiple field length violations in the same request no longer cause several log entries to be written. [@mkauf] *) mod_ssl: OCSP does not apply to proxy mode. PR 63679. [Lubos Uhliarik , Yann Ylavic] *) mod_proxy_html, mod_xml2enc: Fix build issues with macOS due to r1864469 [Jim Jagielski] *) mod_authn_socache: Increase the maximum length of strings that can be cached by the module from 100 to 256. PR 62149 [] *) mod_proxy: Fix crash by resolving pool concurrency problems. PR 63503 [Ruediger Pluem, Eric Covener] *) core: On Windows, fix a start-up crash if is used with a path that is not valid (For example, testing for a file on a flash drive that is not mounted) [Christophe Jaillet] *) mod_deflate, mod_brotli: honor "Accept-Encoding: foo;q=0" as per RFC 7231; which means 'foo' is "not acceptable". PR 58158 [Chistophe Jaillet] *) mod_md v2.2.3: - Configuring MDCAChallenges replaces any previous existing challenge configuration. It had been additive before which was not the intended behaviour. [@mkauf] - Fixing order of ACME challenges used when nothing else configured. Code now behaves as documented for `MDCAChallenges`. Fixes #156. Thanks again to @mkauf for finding this. - Fixing a potential, low memory null pointer dereference [thanks to @uhliarik]. - Fixing an incompatibility with a change in libcurl v7.66.0 that added unwanted "transfer-encoding" to POST requests. This failed in direct communication with Let's Encrypt boulder server. Thanks to @mkauf for finding and fixing. [Stefan Eissing] *) mod_md: Adding the several new features. The module offers an implementation of OCSP Stapling that can replace fully or for a limited set of domains the existing one from mod_ssl. OCSP handling is part of mod_md's monitoring and message notifications. If can be used for sites that do not have ACME certificates. The url for a CTLog Monitor can be configured. It is used in the server-status to link to the external status page of a certificate. The MDMessageCmd is called with argument "installed" when a new certificate has been activated on server restart/reload. This allows for processing of the new certificate, for example to applications that require it in different locations or formats. [Stefan Eissing] *) mod_proxy_balancer: Fix case-sensitive referer check related to CSRF/XSS protection. PR 63688. [Armin Abfalterer ] Changes with Apache 2.4.41 *) SECURITY: CVE-2019-10097 (cve.mitre.org) mod_remoteip: Fix stack buffer overflow and NULL pointer deference when reading the PROXY protocol header. [Joe Orton, Daniel McCarney ] *) SECURITY: CVE-2019-9517 (cve.mitre.org) mod_http2: a malicious client could perform a DoS attack by flooding a connection with requests and basically never reading responses on the TCP connection. Depending on h2 worker dimensioning, it was possible to block those with relatively few connections. [Stefan Eissing] *) SECURITY: CVE-2019-10098 (cve.mitre.org) rewrite, core: Set PCRE_DOTALL flag by default to avoid unpredictable matches and substitutions with encoded line break characters. [Yann Ylavic] *) SECURITY: CVE-2019-10092 (cve.mitre.org) Remove HTML-escaped URLs from canned error responses to prevent misleading text/links being displayed via crafted links. [Eric Covener] *) SECURITY: CVE-2019-10082 (cve.mitre.org) mod_http2: Using fuzzed network input, the http/2 session handling could be made to read memory after being freed, during connection shutdown. [Stefan Eissing] *) SECURITY: CVE-2019-10081 (cve.mitre.org) mod_http2: HTTP/2 very early pushes, for example configured with "H2PushResource", could lead to an overwrite of memory in the pushing request's pool, leading to crashes. The memory copied is that of the configured push link header values, not data supplied by the client. [Stefan Eissing] *) mod_proxy_balancer: Improve balancer-manager protection against XSS/XSRF attacks from trusted users. [Joe Orton, Niels Heinen ] *) mod_session: Introduce SessionExpiryUpdateInterval which allows to configure the session/cookie expiry's update interval. PR 57300. [Paul Spangler ] *) modules/filters: Fix broken compilation when using old GCC (/.httpd/certificate-status - Managed Domains are now in Apache's 'server-status' page - A new handler 'md-status' exposes verbose status information in JSON format - new directives - "MDCertificateFile" and "MDCertificateKeyFile" to configure a Managed Domain that uses static files. Auto-renewal is turned off for those. - "MDMessageCmd" that is invoked on several events: 'renewed', 'expiring' and 'errored'. - "MDWarnWindow" directive to configure when expiration warnings shall be issued. [Stefan Eissing] *) mod_mime_magic: Fix possible corruption of returned strings. [Christophe Jaillet] *) Default "conf/magic": Fix pattern for "audio/x-wav" for WAV files, remove "audio/unknown" pattern for other RIFF files. [Àngel Ollé Blázquez ] *) mod_proxy_http2: fixing a potential NULL pointer use in logging. [Christophe Jaillet, Dr Silvio Cesare InfoSect] *) mod_dav: Reduce the amount of memory needed when doing PROPFIND's on large collections by improving the memory management. [Joe Orton, Ruediger Pluem] *) mod_proxy_http2: adding support for handling trailers in both directions. PR 63502. [Stefan Eissing] *) mod_proxy_http: forward 100-continue, and minimize race conditions when reusing backend connections. PR 60330. [Yann Ylavic, Jean-Frederic Clere] *) mod_proxy_balancer: Fix some HTML syntax issues. [Christophe Jaillet] *) When using mod_status with the Event MPM, report the number of requests associated with an active connection in the "ACC" field. Previously zero was always reported with this MPM. PR60647. [Eric Covener] *) mod_http2: remove the no longer existing h2_ngn_shed.c from Cmake. [Stefan Eissing] *) mod_proxy/ssl: Proxy SSL client certificate configuration and other proxy SSL configurations broken inside context. PR 63430. [Ruediger Pluem, Yann Ylavic] *) mod_proxy: allow SSLProxyCheckPeer* usage for all proxy modules. PR 61857. [Markus Gausling , Yann Ylavic] *) mod_reqtimeout: Fix default rates missing (not applied) in 2.4.39. PR 63325. [Yann Ylavic] *) mod_info: Fix output of server settings for PIPE_BUF in mod_info in the rare case that PIPE_BUF is defined. [Rainer Jung] *) mod_md: Store permissions are enforced on file creation, enforcing restrictions in spite of umask. Fixes . [Stefan Eissing] Changes with Apache 2.4.39 *) SECURITY: CVE-2019-0197 (cve.mitre.org) mod_http2: fixes a possible crash when HTTP/2 was enabled for a http: host or H2Upgrade was enabled for h2 on a https: host. An Upgrade request from http/1.1 to http/2 that was not the first request on a connection could lead to a misconfiguration and crash. Servers that never enabled the h2 protocol or only enabled it for https: and did not set "H2Upgrade on" are unaffected by this issue. [Stefan Eissing] *) SECURITY: CVE-2019-0196 (cve.mitre.org) mod_http2: using fuzzed network input, the http/2 request handling could be made to access freed memory in string comparison when determining the method of a request and thus process the request incorrectly. [Stefan Eissing] *) SECURITY: CVE-2019-0211 (cve.mitre.org) MPMs unix: Fix a local privilege escalation vulnerability by not maintaining each child's listener bucket number in the scoreboard, preventing unprivileged code like scripts run by/on the server (e.g. via mod_php) from modifying it persistently to abuse the privileged main process. [Charles Fol , Yann Ylavic] *) SECURITY: CVE-2019-0217 (cve.mitre.org) mod_auth_digest: Fix a race condition checking user credentials which could allow a user with valid credentials to impersonate another, under a threaded MPM. PR 63124. [Simon Kappel ] *) SECURITY: CVE-2019-0215 (cve.mitre.org) mod_ssl: Fix access control bypass for per-location/per-dir client certificate verification in TLSv1.3. *) SECURITY: CVE-2019-0220 (cve.mitre.org) Merge consecutive slashes in URL's. Opt-out with `MergeSlashes OFF`. [Eric Covener] *) mod_proxy/ssl: Cleanup per-request SSL configuration anytime a backend connection is recycled/reused to avoid a possible crash with some SSLProxy configurations in or context. PR 63256. [Yann Ylavic] *) mod_log_config: Support %{c}h for conn-hostname, %h for useragent_host PR 55348 *) mod_socache_redis: Support for Redis as socache storage provider. *) core: new configuration option 'MergeSlashes on|off' that controls handling of multiple, consecutive slash ('/') characters in the path component of the request URL. [Eric Covener] *) mod_http2: when SSL renegotiation is inhibited and a 403 ErrorDocument is in play, the proper HTTP/2 stream reset did not trigger with H2_ERR_HTTP_1_1_REQUIRED. Fixed. [Michael Kaufmann] *) mod_http2: new configuration directive: `H2Padding numbits` to control padding of HTTP/2 payload frames. 'numbits' is a number from 0-8, controlling the range of padding bytes added to a frame. The actual number added is chosen randomly per frame. This applies to HEADERS, DATA and PUSH_PROMISE frames equally. The default continues to be 0, e.g. no padding. [Stefan Eissing] *) mod_http2: ripping out all the h2_req_engine internal features now that mod_proxy_http2 has no more need for it. Optional functions are still declared but no longer implemented. While previous mod_proxy_http2 will work with this, it is recommended to run the matching versions of both modules. [Stefan Eissing] *) mod_proxy_http2: changed mod_proxy_http2 implementation and fixed several bugs which resolve PR63170. The proxy module does now a single h2 request on the (reused) connection and returns. [Stefan Eissing] *) mod_http2/mod_proxy_http2: proxy_http2 checks correct master connection aborted status to trigger immediate shutdown of backend connections. This is now always signalled by mod_http2 when the the session is being released. proxy_http2 now only sends a PING frame to the backend when there is not already one in flight. [Stefan Eissing] *) mod_proxy_http2: fixed an issue where a proxy_http2 handler entered an infinite loop when encountering certain errors on the backend connection. See . [Stefan Eissing] *) mod_http2: Configuration directives H2Push and H2Upgrade can now be specified per Location/Directory, e.g. disabling PUSH for a specific set of resources. [Stefan Eissing] *) mod_http2: HEAD requests to some module such as mod_cgid caused the stream to terminate improperly and cause a HTTP/2 PROTOCOL_ERROR. Fixes . [Michael Kaufmann] *) http: Fix possible empty response with mod_ratelimit for HEAD requests. PR 63192. [Yann Ylavic] *) mod_cache_socache: Avoid reallocations and be safe with outgoing data lifetime. [Yann Ylavic] *) mod_http2: enable re-use of slave connections again. Fixed slave connection keepalives counter. [Stefan Eissing] *) mod_reqtimeout: Allow to configure (TLS-)handshake timeouts. PR 61310. [Yann Ylavic] *) core: Split out the ability to parse wildcard files and directories from the Include/IncludeOptional directives into a generic set of functions ap_dir_nofnmatch() and ap_dir_fnmatch(). [Graham Leggett] *) mod_proxy_wstunnel: Fix websocket proxy over UDS. PR 62932 *) mod_ssl: Don't unset FIPS mode on restart unless it's forced by configuration (SSLFIPS on) and not active by default in OpenSSL. PR 63136. [Yann Ylavic] Changes with Apache 2.4.38 *) SECURITY: CVE-2018-17199 (cve.mitre.org) mod_session: mod_session_cookie does not respect expiry time allowing sessions to be reused. [Hank Ibell] *) SECURITY: CVE-2018-17189 (cve.mitre.org) mod_http2: fixes a DoS attack vector. By sending slow request bodies to resources not consuming them, httpd cleanup code occupies a server thread unnecessarily. This was changed to an immediate stream reset which discards all stream state and incoming data. [Stefan Eissing] *) SECURITY: CVE-2019-0190 (cve.mitre.org) mod_ssl: Fix infinite loop triggered by a client-initiated renegotiation in TLSv1.2 (or earlier) with OpenSSL 1.1.1 and later. PR 63052. [Joe Orton] *) mod_ssl: Clear retry flag before aborting client-initiated renegotiation. PR 63052 [Joe Orton] *) mod_negotiation: Treat LanguagePriority as case-insensitive to match AddLanguage behavior and HTTP specification. PR 39730 [Christophe Jaillet] *) mod_md: incorrect behaviour when synchronizing ongoing ACME challenges have been fixed. [Michael Kaufmann, Stefan Eissing] *) mod_setenvif: We can have expressions that become true if a regex pattern in the expression does NOT match. In this case val is NULL and we should just set the value for the environment variable like in the pattern case. [Ruediger Pluem] *) mod_session: Always decode session attributes early. [Hank Ibell] *) core: Incorrect values for environment variables are substituted when multiple environment variables are specified in a directive. [Hank Ibell] *) mod_rewrite: Only create the global mutex used by "RewriteMap prg:" when this type of map is present in the configuration. PR62311. [Hank Ibell ] *) mod_dav: Fix invalid Location header when a resource is created by passing an absolute URI on the request line [Jim Jagielski] *) mod_session_cookie: avoid duplicate Set-Cookie header in the response. [Emmanuel Dreyfus , Luca Toscano] *) mod_ssl: clear *SSL errors before loading certificates and checking afterwards. Otherwise errors are reported when other SSL using modules are in play. Fixes PR 62880. [Michael Kaufmann] *) mod_ssl: Fix the error code returned in an error path of 'ssl_io_filter_handshake()'. This messes-up error handling performed in 'ssl_io_filter_error()' [Yann Ylavic] *) mod_ssl: Fix $HTTPS definition for "SSLEngine optional" case, and fix authz provider so "Require ssl" works correctly in HTTP/2. PR 61519, 62654. [Joe Orton, Stefan Eissing] *) mod_proxy: If ProxyPassReverse is used for reverse mapping of relative redirects, subsequent ProxyPassReverse statements, whether they are relative or absolute, may fail. PR 60408. [Peter Haworth ] *) mod_lua: Now marked as a stable module [https://s.apache.org/Xnh1] Changes with Apache 2.4.37 *) mod_ssl: Fix HTTP/2 failures when using OpenSSL 1.1.1. [Rainer Jung] *) mod_ssl: Fix crash during SSL renegotiation with OptRenegotiate set, when client certificates are available from the original handshake but were originally not verified and should get verified now. This is a regression in 2.4.36 (unreleased). [Ruediger Pluem] *) mod_ssl: Correctly merge configurations that have client certificates set by SSLProxyMachineCertificate{File|Path}. [Ruediger Pluem] Changes with Apache 2.4.36 *) mod_brotli, mod_deflate: Restore the separate handling of 304 Not Modified responses. Regression introduced in 2.4.35. *) mod_proxy_scgi, mod_proxy_uwsgi: improve error handling when sending the body of the response. [Jim Jagielski] *) mpm_event: Stop issuing AH00484 "server reached MaxRequestWorkers..." when there are still idle threads available. When there are less idle threads than MinSpareThreads, issue new one-time message AH10159. Matches worker MPM. [Eric Covener] *) mod_http2: adding defensive code for stream EOS handling, in case the request handler missed to signal it the normal way (eos buckets). Addresses github issues https://github.com/icing/mod_h2/issues/164, https://github.com/icing/mod_h2/issues/167 and https://github.com/icing/mod_h2/issues/170. [Stefan Eissing] *) ab: Add client certificate support. PR 55774. [Graham Leggett] *) ab: Disable printing temp key for OpenSSL before version 1.0.2. SSL_get_server_tmp_key is not available there. [Rainer Jung] *) mod_ssl: Fix a regression that the configuration settings for verify mode and verify depth were taken from the frontend connection in case of connections by the proxy to the backend. PR 62769. [Ruediger Pluem] *) MPMs: Initialize all runtime/asynchronous objects on a dedicated pool and before signals handling to avoid lifetime issues on restart or shutdown. PR 62658. [Yann Ylavic] *) mod_ssl: Add support for OpenSSL 1.1.1 and TLSv1.3. TLSv1.3 has behavioural changes compared to v1.2 and earlier; client and configuration changes should be expected. SSLCipherSuite is enhanced for TLSv1.3 ciphers, but applies at vhost level only. [Stefan Eissing, Yann Ylavic, Ruediger Pluem, Joe Orton] *) mod_auth_basic: Be less tolerant when parsing the credencial. Only spaces should be accepted after the authorization scheme. \t are also tolerated. [Christophe Jaillet] *) mod_socache_redis: New socache submodule provider to allow use of Redis as storage backend. [Jim Jagielski] *) mod_proxy_hcheck: Fix issues with interval determination. PR 62318 [Jim Jagielski] *) mod_proxy_hcheck: Fix issues with TCP health checks. PR 61499 [Dominik Stillhard ] *) mod_proxy_hcheck: take balancer's SSLProxy* directives into account. [Jim Jagielski] *) mod_status, mod_echo: Fix the display of client addresses. They were truncated to 31 characters which is not enough for IPv6 addresses. This is done by deprecating the use of the 'client' field and using the new 'client64' field in worker_score. PR 54848 [Bernhard Schmidt , Jim Jagielski] Changes with Apache 2.4.35 *) http: Enforce consistently no response body with both 204 and 304 statuses. [Yann Ylavic] *) mod_status: Cumulate CPU time of exited child processes in the "cu" and "cs" values. Add CPU time of the parent process to the "c" and "s" values. [Rainer Jung] *) mod_proxy: Improve the balancer member data shown in mod_status when "ProxyStatus" is "On": add "busy" count and show byte counts in auto mode always in units of kilobytes. [Rainer Jung] *) mod_status: Add cumulated response duration time in milliseconds. [Rainer Jung] *) mod_status: Complete the data shown for async MPMs in "auto" mode. Added number of processes, number of stopping processes and number of busy and idle workers. [Rainer Jung] *) mod_ratelimit: Don't interfere with "chunked" encoding, fixing regression introduced in 2.4.34. PR 62568. [Yann Ylavic] *) mod_proxy: Remove load order and link dependency between mod_lbmethod_* modules and mod_proxy. PR 62557. [Ruediger Pluem, William Rowe] *) Allow the argument to , , , , and to be quoted. This is primarily for the benefit of . [Eric Covener] *) mod_watchdog: Correct some log messages. [Rainer Jung] *) mod_md: When the last domain name from an MD is moved to another one, that now empty MD gets moved to the store archive. PR 62572. [Stefan Eissing] *) mod_ssl: Fix merging of SSLOCSPOverrideResponder. [Jeff Trawick, [Frank Meier ] *) mod_proxy_balancer: Restore compatibility with APR 1.4. [Joe Orton] Changes with Apache 2.4.34 *) SECURITY: CVE-2018-8011 (cve.mitre.org) mod_md: DoS via Coredumps on specially crafted requests *) SECURITY: CVE-2018-1333 (cve.mitre.org) mod_http2: DoS for HTTP/2 connections by specially crafted requests *) Introduce zh-cn and zh-tw (simplified and traditional Chinese) error document translations. [CodeingBoy, popcorner] *) event: avoid possible race conditions with modules on the child pool. [Stefan Fritsch] *) mod_proxy: Fix a corner case where the ProxyPassReverseCookieDomain or ProxyPassReverseCookiePath directive could fail to update correctly 'domain=' or 'path=' in the 'Set-Cookie' header. PR 61560. [Christophe Jaillet] *) mod_ratelimit: fix behavior when proxing content. PR 62362. [Luca Toscano, Yann Ylavic] *) core: Re-allow '_' (underscore) in hostnames. [Eric Covener] *) mod_authz_core: If several parameters are used in a AuthzProviderAlias directive, if these parameters are not enclosed in quotation mark, only the first one is handled. The other ones are silently ignored. Add a message to warn about such a spurious configuration. PR 62469 [Hank Ibell , Christophe Jaillet] *) mod_md: improvements and bugfixes - MDNotifyCmd now takes additional parameter that are passed on to the called command. - ACME challenges have better checks for interference with other modules - ACME challenges are only handled for domains managed by the module, allowing other ACME clients to operate for other domains in the server. - better libressl integration *) mod_proxy_wstunnel: Add default schema ports for 'ws' and 'wss'. PR 62480. [Lubos Uhliarik } *) logging: Some early logging-related startup messages could be lost when using syslog for the global ErrorLog. [Eric Covener] *) mod_cache: Handle case of an invalid Expires header value RFC compliant like the case of an Expires time in the past: allow to overwrite the non-caching decision using CacheStoreExpired and respect Cache-Control "max-age" and "s-maxage". [Rainer Jung] *) mod_xml2enc: Fix forwarding of error metadata/responses. PR 62180. [Micha Lenk , Yann Ylavic] *) mod_proxy_http: Fix response header thrown away after the previous one was considered too large and truncated. PR 62196. [Yann Ylavic] *) core: Add and handle AP_GETLINE_NOSPC_EOL flag for ap_getline() family of functions to consume the end of line when the buffer is exhausted. PR 62198. [Yann Ylavic] *) mod_proxy_http: Add new worker parameter 'responsefieldsize' to allow maximum HTTP response header size to be increased past 8192 bytes. PR 62199. [Hank Ibell ] *) mod_ssl: Extend SSLOCSPEnable with mode 'leaf' that only checks the leaf of a certificate chain. PR62112. [Ricardo Martin Camarero ] *) http: Fix small memory leak per request when handling persistent connections. [Ruediger Pluem, Joe Orton] *) mod_proxy_html: Fix variable interpolation and memory allocation failure in ProxyHTMLURLMap. PR 62344. [Ewald Dieterich ] *) mod_remoteip: Fix RemoteIP{Trusted,Internal}ProxyList loading broken by 2.4.30. PR 62220. [Chritophe Jaillet, Yann Ylavic] *) mod_remoteip: When overriding the useragent address from X-Forwarded-For, zero out what had been initialized as the connection-level port. PR59931. [Hank Ibell ] *) core: In ONE_PROCESS/debug mode, cleanup everything when exiting. [Yann Ylavic] *) mod_proxy_balancer: Add hot spare member type and corresponding flag (R). Hot spare members are used as drop-in replacements for unusable workers in the same load balancer set. This differs from hot standbys which are only used when all workers in a set are unusable. PR 61140. [Jim Riggs] *) suexec: Add --enable-suexec-capabilites support on Linux, to use setuid/setgid capability bits rather than a setuid root binary. [Joe Orton] *) suexec: Add support for logging to syslog as an alternative to logging to a file; use --without-suexec-logfile --with-suexec-syslog. [Joe Orton] *) mod_ssl: Restore 2.4.29 behaviour in SSL vhost merging/enabling which broke some rare but previously-working configs. [Joe Orton] *) core, log: improve sanity checks for the ErrorLog's syslog config, and explicitly allow only lowercase 'syslog' settings. PR 62102 [Luca Toscano, Jim Riggs, Christophe Jaillet] *) mod_http2: accurate reporting of h2 data input/output per request via mod_logio. Fixes an issue where output sizes where counted n-times on reused slave connections. [Stefan Eissing] See github issue: https://github.com/icing/mod_h2/issues/158 *) mod_http2: Fix unnecessary timeout waits in case streams are aborted. [Stefan Eissing] *) mod_http2: restoring the v1.10.16 keepalive timeout behaviour of mod_http2. [Stefan Eissing] *) mod_proxy: Do not restrict the maximum pool size for backend connections any longer by the maximum number of threads per process and use a better default if mod_http2 is loaded. [Yann Ylavic, Ruediger Pluem, Stefan Eissing, Gregg Smith] *) mod_slotmem_shm: Add generation number to shm filename to fix races with graceful restarts. PRs 62044 and 62308. [Jim Jagielski, Yann Ylavic] *) core: Preserve the original HTTP request method in the '%] *) mod_remoteip: make proxy-protocol work on slave connections, e.g. in HTTP/2 requests. [Stefan Eissing] See also https://github.com/roadrunner2/mod-proxy-protocol/issues/6 *) mod_ssl: Fix merging of proxy SSL context outside sections, regression introduced in 2.4.30. PR 62232. [Rainer Jung, Yann Ylavic] *) mod_md: Fix compilation with OpenSSL before version 1.0.2. [Rainer Jung] *) mod_dumpio: do nothing below log level TRACE7. [Yann Ylavic] *) mod_remoteip: Restore compatibility with APR 1.4 (apr_sockaddr_is_wildcard). [Eric Covener] *) core: On ECBDIC platforms, some errors related to oversized headers may be misreported or be logged as ASCII escapes. PR 62200 [Hank Ibell ] *) mod_ssl: Fix cmake-based build. PR 62266. [Rainer Jung] *) core: Add , and conditional section containers. [Eric Covener, Joe Orton] *) rotatelogs: Add -D option to create parent directories. PR 46669. [Philippe Lantin , Ben Reser, Rainer Jung] Changes with Apache 2.4.33 *) core: Fix request timeout logging and possible crash for error_log hooks. [Yann Ylavic] *) mod_slomem_shm: Fix failure to create balancers's slotmems in Windows MPM, where children processes need to attach them instead since they are owned by the parent process already. [Yann Ylavic] *) ab: try all destination socket addresses returned by apr_sockaddr_info_get instead of failing on first one when not available. Needed for instance if localhost resolves to both ::1 and 127.0.0.1 e.g. if both are in /etc/hosts. [Jan Kaluza] *) ab: Use only one connection to determine working destination socket address. [Jan Kaluza] *) ab: LibreSSL doesn't have or require Windows applink.c. [Gregg L. Smith] *) htpasswd/htdigest: Disable support for bcrypt on EBCDIC platforms. apr-util's bcrypt implementation doesn't tolerate EBCDIC. [Eric Covener] *) htpasswd/htdbm: report the right limit when get_password() overflows. [Yann Ylavic] *) htpasswd: Don't fail in -v mode if password file is unwritable. PR 61631. [Joe Orton] *) htpasswd: don't point to (unused) stack memory on output to make static analysers happy. PR 60634. [Yann Ylavic, reported by shqking and Zhenwei Zou] Changes with Apache 2.4.32 *) mod_access_compat: Fail if a comment is found in an Allow or Deny directive. [Jan Kaluza] *) mod_authz_host: Ignore comments after "Require host", logging a warning, or logging an error if the line is otherwise empty. [Jan Kaluza, Joe Orton] *) rotatelogs: Fix expansion of %Z in localtime (-l) mode, and fix Y2K38 bug. [Joe Orton] *) mod_ssl: Support SSL DN raw variable extraction without conversion to UTF-8, using _RAW suffix on variable names. [Joe Orton] *) ab: Fix https:// connection failures (regression in 2.4.30); fix crash generating CSV output for large -n. [Joe Orton, Jan Kaluza] Changes with Apache 2.4.31 (not released) *) mod_proxy_fcgi: Add the support for mod_proxy's flushpackets and flushwait parameters. [Luca Toscano, Ruediger Pluem, Yann Ylavic] *) mod_ldap: Avoid possible crashes, hangs, and busy loops due to improper merging of the cache lock in vhost config. PR 43164 [Eric Covener] *) mpm_event: Do lingering close in worker(s). [Yann Ylavic] *) mpm_queue: Put fdqueue code in common for MPMs event and worker. [Yann Ylavic] Changes with Apache 2.4.30 (not released) *) SECURITY: CVE-2017-15710 (cve.mitre.org) Out of bound write in mod_authnz_ldap with AuthLDAPCharsetConfig enabled [Eric Covener, Luca Toscano, Yann Ylavic] *) SECURITY: CVE-2018-1283 (cve.mitre.org) mod_session: CGI-like applications that intend to read from mod_session's 'SessionEnv ON' could be fooled into reading user-supplied data instead. [Yann Ylavic] *) SECURITY: CVE-2018-1303 (cve.mitre.org) mod_cache_socache: Fix request headers parsing to avoid a possible crash with specially crafted input data. [Ruediger Pluem] *) SECURITY: CVE-2018-1301 (cve.mitre.org) core: Possible crash with excessively long HTTP request headers. Impractical to exploit with a production build and production LogLevel. [Yann Ylavic] *) SECURITY: CVE-2017-15715 (cve.mitre.org) core: Configure the regular expression engine to match '$' to the end of the input string only, excluding matching the end of any embedded newline characters. Behavior can be changed with new directive 'RegexDefaultOptions'. [Yann Ylavic] *) SECURITY: CVE-2018-1312 (cve.mitre.org) mod_auth_digest: Fix generation of nonce values to prevent replay attacks across servers using a common Digest domain. This change may cause problems if used with round robin load balancers. PR 54637 [Stefan Fritsch] *) SECURITY: CVE-2018-1302 (cve.mitre.org) mod_http2: Potential crash w/ mod_http2. [Stefan Eissing] *) mod_proxy: Provide an RFC1035 compliant version of the hostname in the proxy_worker_shared structure. PR62085 [Graham Leggett] *) mod_proxy: Worker schemes and hostnames which are too large are no longer fatal errors; it is logged and the truncated values are stored. [Jim Jagielski] *) mod_proxy: Allow setting options to globally defined balancer from ProxyPass used in VirtualHost. Balancers are now merged using the new merge_balancers method which merges the balancers options. [Jan Kaluza] *) logresolve: Fix incorrect behavior or segfault if -c flag is used Fixes: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=823259 [Stefan Fritsch] *) mod_remoteip: Add support for PROXY protocol (code donated by Cloudzilla). Add ability for PROXY protocol processing to be optional to donated code. See also: http://www.haproxy.org/download/1.5/doc/proxy-protocol.txt [Cloudzilla/roadrunner2@GitHub, Jim Jagielski, Daniel Ruggeri] *) mod_proxy, mod_ssl: Handle SSLProxy* directives in sections, allowing per backend TLS configuration. [Yann Ylavic] *) mod_proxy_uwsgi: Add in UWSGI proxy (sub)module. [Roberto De Ioris, Jim Jagielski] *) mod_proxy_balancer,mod_slotmem_shm: Rework SHM reuse/deletion to not depend on the number of restarts (non-Unix systems) and preserve shared names as much as possible on configuration changes for SHMs and persisted files. PR 62044. [Yann Ylavic, Jim Jagielski] *) mod_http2: obsolete code removed, no more events on beam pool destruction, discourage content encoders on http2-status response (where they do not work). [Stefan Eissing] *) mpm_event: Let the listener thread do its maintenance job on resources shortage. PR 61979. [Yann Ylavic] *) mpm_event: Wakeup the listener to re-enable listening sockets. [Yann Ylavic] *) mod_ssl: The SSLCompression directive will now give an error if used with an OpenSSL build which does not support any compression methods. [Joe Orton] *) mpm_event,worker: Mask signals for threads created by modules in child init, so that they don't receive (implicitly) the ones meant for the MPM. PR 62009. [Armin Abfalterer , Yann Ylavic] *) mod_md: new experimental, module for managing domains across virtual hosts, implementing the Let's Encrypt ACMEv1 protocol to signup and renew certificates. Please read the modules documentation for further instructions on how to use it. [Stefan Eissing] *) mod_proxy_html: skip documents shorter than 4 bytes PR 56286 [Micha Lenk ] *) core, mpm_event: Avoid a small memory leak of the scoreboard handle, for the lifetime of the connection, each time it is processed by MPM event. [Yann Ylavic] *) mpm_event: Update scoreboard status for KeepAlive state. [Yann Ylavic] *) mod_ldap: Fix a case where a full LDAP cache would continually fail to purge old entries and log AH01323. PR61891. [Hendrik Harms ] *) mpm_event: close connections not reported as handled by any module to avoid losing track of them and leaking scoreboard entries. PR 61551. [Yann Ylavic] *) core: A signal received while stopping could have crashed the main process. PR 61558. [Yann Ylavic] *) mod_ssl: support for mod_md added. [Stefan Eissing] *) mod_proxy_html: process parsed comments immediately. Fixes bug (seen in the wild when used with IBM's HTTPD bundle) where parsed comments may be lost. [Nick Kew] *) mod_proxy_html: introduce doctype for HTML 5 [Nick Kew] *) mod_proxy_html: fix typo-bug processing "strict" vs "transitional" HTML/XHTML. PR 56457 [Nick Kew] *) mpm_event: avoid a very unlikely race condition between the listener and the workers when the latter fails to add a connection to the pollset. [Yann Ylavic] *) core: silently ignore a not existent file path when IncludeOptional is used. PR 57585. [Alberto Murillo Silva , Luca Toscano] *) mod_macro: fix usability of globally defined macros in .htaccess files. PR 57525. [Jose Kahan , Yann Ylavic] *) mod_rewrite, core: add the Vary header when a condition evaluates to true and the related RewriteRule is used in a Directory context (triggering an internal redirect). [Luca Toscano] *) ab: Make the TLS layer aware that the underlying socket is nonblocking, and use/handle POLLOUT where needed to avoid busy IOs and recover write errors when appropriate. [Yann Ylavic] *) ab: Keep reading nonblocking to exhaust TCP or SSL buffers when previous read was incomplete (the SSL case can cause the next poll() to timeout since data are buffered already). PR 61301 [Luca Toscano, Yann Ylavic] *) mod_http2: avoid unnecessary data retrieval for a trace log. Allow certain information retrievals on null bucket beams where it makes sense. [Stefan Eissing] Changes with Apache 2.4.29 *) mod_unique_id: Use output of the PRNG rather than IP address and pid, avoiding sleep() call and possible DNS issues at startup, plus improving randomness for IPv6-only hosts. [Jan Kaluza] *) mod_rewrite, core: Avoid the 'Vary: Host' response header when HTTP_HOST is used in a condition that evaluates to true. PR 58231 [Luca Toscano, Yann Ylavic] *) mod_http2: v0.10.12, removed optimization for mutex handling in bucket beams that could lead to assertion failure in edge cases. [Stefan Eissing] *) mod_proxy: Fix regression for non decimal loadfactor parameter introduced in 2.4.28. [Jim Jagielski] *) mod_authz_dbd: fix a segmentation fault if AuthzDBDQuery is not set. PR 61546. [Lubos Uhliarik ] *) mod_rewrite: Add support for starting External Rewriting Programs as non-root user on UNIX systems by specifying username and group name as third argument of RewriteMap directive. [Jan Kaluza] *) core: Rewrite the Content-Length filter to avoid excessive memory consumption. Chunked responses will be generated in more cases than in previous releases. PR 61222. [Joe Orton, Ruediger Pluem] *) mod_ssl: Fix SessionTicket callback return value, which does seem to matter with OpenSSL 1.1. [Yann Ylavic] Changes with Apache 2.4.28 *) SECURITY: CVE-2017-9798 (cve.mitre.org) Corrupted or freed memory access. must now be used in the main configuration file (httpd.conf) to register HTTP methods before the .htaccess files. [Yann Ylavic] *) event: Avoid possible blocking in the listener thread when shutting down connections. PR 60956. [Yann Ylavic] *) mod_speling: Don't embed referer data in a link in error page. PR 38923 [Nick Kew] *) htdigest: prevent a buffer overflow when a string exceeds the allowed max length in a password file. PR 61511. [Luca Toscano, Hanno Böck ] *) mod_proxy: loadfactor parameter can now be a decimal number (eg: 1.25). [Jim Jagielski] *) mod_proxy_wstunnel: Allow upgrade to any protocol dynamically. PR 61142. *) mod_watchdog/mod_proxy_hcheck: Time intervals can now be specified down to the millisecond. Supports 'mi' (minute), 'ms' (millisecond), 's' (second) and 'hr' (hour!) time suffixes. [Jim Jagielski] *) mod_http2: Fix for stalling when more than 32KB are written to a suspended stream. [Stefan Eissing] *) build: allow configuration without APR sources. [Jacob Champion] *) mod_ssl, ab: Fix compatibility with LibreSSL. PR 61184. [Bernard Spil , Michael Schlenker , Yann Ylavic] *) core/log: Support use of optional "tag" in syslog entries. PR 60525. [Ben Rubson , Jim Jagielski] *) mod_proxy: Fix ProxyAddHeaders merging. [Joe Orton] *) core: Disallow multiple Listen on the same IP:port when listener buckets are configured (ListenCoresBucketsRatio > 0), consistently with the single bucket case (default), thus avoiding the leak of the corresponding socket descriptors on graceful restart. [Yann Ylavic] *) event: Avoid listener periodic wake ups by using the pollset wake-ability when available. PR 57399. [Yann Ylavic, Luca Toscano] *) mod_proxy_wstunnel: Fix detection of unresponded request which could have led to spurious HTTP 502 error messages sent on upgrade connections. PR 61283. [Yann Ylavic] Changes with Apache 2.4.27 *) SECURITY: CVE-2017-9789 (cve.mitre.org) mod_http2: Read after free. When under stress, closing many connections, the HTTP/2 handling code would sometimes access memory after it has been freed, resulting in potentially erratic behaviour. [Stefan Eissing] *) SECURITY: CVE-2017-9788 (cve.mitre.org) mod_auth_digest: Uninitialized memory reflection. The value placeholder in [Proxy-]Authorization headers type 'Digest' was not initialized or reset before or between successive key=value assignments. [William Rowe] *) COMPATIBILITY: mod_lua: Remove the undocumented exported 'apr_table' global variable when using Lua 5.2 or later. This was exported as a side effect from luaL_register, which is no longer supported as of Lua 5.2 which deprecates pollution of the global namespace. [Rainer Jung] *) COMPATIBILITY: mod_http2: Disable and give warning when using Prefork. The server will continue to run, but HTTP/2 will no longer be negotiated. [Stefan Eissing] *) COMPATIBILITY: mod_proxy_fcgi: Revert to 2.4.20 FCGI behavior for the default ProxyFCGIBackendType, fixing a regression with PHP-FPM. PR 61202. [Jacob Champion, Jim Jagielski] *) mod_lua: Improve compatibility with Lua 5.1, 5.2 and 5.3. PR58188, PR60831, PR61245. [Rainer Jung] *) mod_http2: Simplify ready queue, less memory and better performance. Update mod_http2 version to 1.10.7. [Stefan Eissing] *) Allow single-char field names inadvertently disallowed in 2.4.25. PR 61220. [Yann Ylavic] *) htpasswd / htdigest: Do not apply the strict permissions of the temporary passwd file to a possibly existing passwd file. PR 61240. [Ruediger Pluem] *) core: Avoid duplicate HEAD in Allow header. This is a regression in 2.4.24 (unreleased), 2.4.25 and 2.4.26. PR 61207. [Christophe Jaillet] Changes with Apache 2.4.26 *) SECURITY: CVE-2017-7679 (cve.mitre.org) mod_mime can read one byte past the end of a buffer when sending a malicious Content-Type response header. [Yann Ylavic] *) SECURITY: CVE-2017-7668 (cve.mitre.org) The HTTP strict parsing changes added in 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value. [Jacob Champion] *) SECURITY: CVE-2017-7659 (cve.mitre.org) A maliciously constructed HTTP/2 request could cause mod_http2 to dereference a NULL pointer and crash the server process. *) SECURITY: CVE-2017-3169 (cve.mitre.org) mod_ssl may dereference a NULL pointer when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port. [Yann Ylavic] *) SECURITY: CVE-2017-3167 (cve.mitre.org) Use of the ap_get_basic_auth_pw() by third-party modules outside of the authentication phase may lead to authentication requirements being bypassed. [Emmanuel Dreyfus , Jacob Champion, Eric Covener] *) HTTP/2 support no longer tagged as "experimental" but is instead considered fully production ready. *) mod_http2: Fix for possible CPU busy loop introduced in v1.10.3 where a stream may keep the session in continuous check for state changes that never happen. [Stefan Eissing] *) mod_proxy_wstunnel: Add "upgrade" parameter to allow upgrade to other protocols. [Jean-Frederic Clere] *) MPMs unix: Place signals handlers and helpers out of DSOs to avoid a possible crash if a signal is caught during (graceful) restart. PR 60487. [Yann Ylavic] *) mod_rewrite: When a substitution is a fully qualified URL, and the scheme/host/port matches the current virtual host, stop interpreting the path component as a local path just because the first component of the path exists in the filesystem. Adds RewriteOption "LegacyPrefixDocRoot" to revert to previous behavior. PR60009. [Hank Ibell ] *) core: ap_parse_form_data() URL-decoding doesn't work on EBCDIC platforms. PR61124. [Hank Ibell ] *) ab: enable option processing for setting a custom HTTP method also for non-SSL builds. [Rainer Jung] *) core: EBCDIC fixes for interim responses with additional headers. [Eric Covener] *) mod_env: when processing a 'SetEnv' directive, warn if the environment variable name includes a '='. It is likely a configuration error. PR 60249 [Christophe Jaillet] *) Evaluate nested If/ElseIf/Else configuration blocks. [Luca Toscano, Jacob Champion] *) mod_rewrite: Add 'BNP' (backreferences-no-plus) flag to RewriteRule to allow spaces in backreferences to be encoded as %20 instead of '+'. [Eric Covener] *) mod_rewrite: Add the possibility to limit the escaping to specific characters in backreferences by listing them in the B flag. [Eric Covener] *) mod_substitute: Fix spurious AH01328 (Line too long) errors on EBCDIC systems. [Eric Covener] *) mod_http2: fail requests without ERROR log in case we need to read interim responses and see only garbage. This can happen if proxied servers send data where none should be, e.g. a body for a HEAD request. [Stefan Eissing] *) mod_proxy_http2: adding support for Reverse Proxy Request headers. [Stefan Eissing] *) mod_http2: fixed possible deadlock that could occur when connections were terminated early with ongoing streams. Fixed possible hanger with timeout on race when connection considers itself idle. [Stefan Eissing] *) mod_http2: MaxKeepAliveRequests now limits the number of times a slave connection gets reused. [Stefan Eissing] *) mod_brotli: Add a new module for dynamic Brotli (RFC 7932) compression. [Evgeny Kotkov] *) mod_proxy_http2: Fixed bug in re-attempting proxy requests after connection error. Reliability of reconnect handling improved. [Stefan Eissing] *) mod_http2: better performance, eliminated need for nested locks and thread privates. Moving request setups from the main connection to the worker threads. Increase number of spare connections kept. [Stefan Eissing] *) mod_http2: input buffering and dynamic flow windows for increased throughput. Requires nghttp2 >= v1.5.0 features. Announced at startup in mod_http2 INFO log as feature 'DWINS'. [Stefan Eissing] *) mod_http2: h2 workers with improved scalability for better scheduling performance. There are H2MaxWorkers threads created at start and the number is kept constant for now. [Stefan Eissing] *) mod_http2: obsoleted option H2SessionExtraFiles, will be ignored and just log a warning. [Stefan Eissing] *) mod_autoindex: Add IndexOptions UseOldDateFormat to allow the date format from 2.2 in the Last Modified column. PR60846. [Hank Ibell ] *) core: Add %{REMOTE_PORT} to the expression parser. PR59938 [Hank Ibell ] *) mod_cache: Fix a regression in 2.4.25 for the forward proxy case by computing and using the same entity key according to when the cache checks, loads and saves the request. PR 60577. [Yann Ylavic] *) mod_proxy_hcheck: Don't validate timed out responses. [Yann Ylavic] *) mod_proxy_hcheck: Ensure thread-safety when concurrent healthchecks are in use (ProxyHCTPsize > 0). PR 60071. [Yann Ylavic, Jim Jagielski] *) core: %{DOCUMENT_URI} used in nested SSI expressions should point to the URI originally requested by the user, not the nested documents URI. This restores the behavior of this variable to match the "legacy" SSI parser. PR60624. [Hank Ibell ] *) mod_proxy_fcgi: Add ProxyFCGISetEnvIf to fixup CGI environment variables just before invoking the FastCGI. [Eric Covener, Jacob Champion] *) mod_proxy_fcgi: Return to 2.4.20-and-earlier behavior of leaving a "proxy:fcgi://" prefix in the SCRIPT_FILENAME environment variable by default. Add ProxyFCGIBackendType to allow the type of backend to be specified so these kinds of fixups can be restored without impacting FPM. PR60576 [Eric Covener, Jim Jagielski] *) mod_ssl: work around leaks on (graceful) restart. [Yann Ylavic] *) mod_ssl: Add support for OpenSSL 1.1.0. [Rainer Jung] *) Don't set SO_REUSEPORT unless ListenCoresBucketsRatio is greater than zero. [Eric Covener] *) mod_http2: moving session cleanup to pre_close hook to avoid races with modules already shut down and slave connections still operating. [Stefan Eissing] *) mod_lua: Support for Lua 5.3 *) mod_proxy_http2: support for ProxyPreserverHost directive. [Stefan Eissing] *) mod_http2: fix for crash when running out of memory. [Robert Swiecki , Stefan Eissing] *) mod_proxy_fcgi: Return HTTP 504 rather than 503 in case of proxy timeout. [Luca Toscano] *) mod_http2: not counting file buckets again stream max buffer limits. Effectively transferring static files in one step from slave to master connection. [Stefan Eissing] *) mod_http2: comforting ap_check_pipeline() on slave connections to facilitate reuse (see https://github.com/icing/mod_h2/issues/128). [Stefan Eissing, reported by Armin Abfalterer] *) mod_http2: http/2 streams now with state handling/transitions as defined in RFC7540. Stream cleanup/connection shutdown reworked to become easier to understand/maintain/debug. Added many asserts on state and cleanup transitions. [Stefan Eissing] *) mod_auth_digest: Use an anonymous shared memory segment by default, preventing startup failure after unclean shutdown. PR 54622. [Jan Kaluza] *) mod_filter: Fix AddOutputFilterByType with non-content-level filters. PR 58856. [Micha Lenk ] *) mod_watchdog: Fix semaphore leak over restarts. [Jim Jagielski] *) mod_http2: regression fix on PR 59348, on graceful restart, ongoing streams are finished normally before the final GOAWAY is sent. [Stefan Eissing, ] *) mod_proxy: Allow the per-request environment variable "no-proxy" to be used as an alternative to ProxyPass /path !. This is primarily to set exceptions for ProxyPass specified in context. Use SetEnvIf, not SetEnv. PR 60458. [Eric Covener] *) mod_http2: fixes PR60599, sending proper response for conditional requests answered by mod_cache. [Jeff Wheelhouse, Stefan Eissing] *) mod_http2: rework of stream resource cleanup to avoid a crash in a close of a lingering connection. Prohibit special file bucket beaming for shared buckets. Files sent in stream output now use the stream pool as read buffer, reducing memory footprint of connections. [Yann Ylavic, Stefan Eissing] *) mod_proxy_fcgi, mod_fcgid: Fix crashes in ap_fcgi_encoded_env_len() when modules add empty environment variables to the request. PR 60275. [] *) mod_http2: fix for possible page fault when stream is resumed during session shutdown. [sidney-j-r-m (github)] *) mod_http2: fix for h2 session ignoring new responses while already open streams continue to have data available. [Stefan Eissing] *) mod_http2: adding support for MergeTrailers directive. [Stefan Eissing] *) mod_http2: limiting DATA frame sizes by TLS record sizes in use on the connection. Flushing outgoing frames earlier. [Stefan Eissing] *) mod_http2: cleanup beamer registry on server reload. PR 60510. [Pavel Mateja , Stefan Eissing] *) mod_proxy_{ajp,fcgi}: Fix a possible crash when reusing an established backend connection, happening with LogLevel trace2 or higher configured, or at any log level with compilers not detected as C99 compliant (e.g. MSVC on Windows). [Yann Ylavic] *) mod_ext_filter: Don't interfere with "error buckets" issued by other modules. PR 60375. [Eric Covener, Lubos Uhliarik] *) mod_http2: fixes https://github.com/icing/mod_h2/issues/126 e.g. beam bucket lifetime handling when data is sent over temporary pools. [Stefan Eissing] Changes with Apache 2.4.25 *) Fix some build issues related to various modules. [Rainer Jung] Changes with Apache 2.4.24 (not released) *) SECURITY: CVE-2016-8740 (cve.mitre.org) mod_http2: Mitigate DoS memory exhaustion via endless CONTINUATION frames. [Naveen Tiwari and CDF/SEFCOM at Arizona State University, Stefan Eissing] *) SECURITY: CVE-2016-2161 (cve.mitre.org) mod_auth_digest: Prevent segfaults during client entry allocation when the shared memory space is exhausted. [Maksim Malyutin , Eric Covener, Jacob Champion] *) SECURITY: CVE-2016-0736 (cve.mitre.org) mod_session_crypto: Authenticate the session data/cookie with a MAC (SipHash) to prevent deciphering or tampering with a padding oracle attack. [Yann Ylavic, Colm MacCarthaigh] *) SECURITY: CVE-2016-8743 (cve.mitre.org) Enforce HTTP request grammar corresponding to RFC7230 for request lines and request headers, to prevent response splitting and cache pollution by malicious clients or downstream proxies. [William Rowe, Stefan Fritsch] *) Validate HTTP response header grammar defined by RFC7230, resulting in a 500 error in the event that invalid response header contents are detected when serving the response, to avoid response splitting and cache pollution by malicious clients, upstream servers or faulty modules. [Stefan Fritsch, Eric Covener, Yann Ylavic] *) core: Mitigate [f]cgi CVE-2016-5387 "httpoxy" issues. [Dominic Scheirlinck , Yann Ylavic] *) mod_rewrite: Limit runaway memory use by short circuiting some kinds of looping RewriteRules when the local path significantly exceeds LimitRequestLine. PR 60478. [Jeff Wheelhouse ] *) mod_ratelimit: Allow for initial "burst" amount at full speed before throttling: PR 60145 [Andy Valencia , Jim Jagielski] *) mod_socache_memcache: Provide memcache stats to mod_status. [Jim Jagielski] *) mod_file_cache: mod_file_cache should be able to serve files that haven't had a Content-Type set via e.g. mod_mime. [Eric Covener] *) http_filters: Fix potential looping in new check_headers() due to new pattern of ap_die() from http header filter. Explicitly clear the previous headers and body. *) core: Drop Content-Length header and message-body from HTTP 204 responses. PR 51350 [Luca Toscano] *) mod_proxy: Honor a server scoped ProxyPass exception when ProxyPass is configured in , like in 2.2. PR 60458. [Eric Covener] *) mod_lua: Fix default value of LuaInherit directive. It should be 'parent-first' instead of 'none', as per documentation. PR 60419 [Christophe Jaillet] *) core: New directive HttpProtocolOptions to control httpd enforcement of various RFC7230 requirements. [Stefan Fritsch, William Rowe] *) core: Permit unencoded ';' characters to appear in proxy requests and Location: response headers. Corresponds to modern browser behavior. [William Rowe] *) core: ap_rgetline_core now pulls from r->proto_input_filters. *) core: Correctly parse an IPv6 literal host specification in an absolute URL in the request line. [Stefan Fritsch] *) core: New directive RegisterHttpMethod for registering non-standard HTTP methods. [Stefan Fritsch] *) mod_socache_memcache: Pass expiration time through to memcached. PR 55445. [Faidon Liambotis , Joe Orton] *) mod_cache: Use the actual URI path and query-string for identifying the cached entity (key), such that rewrites are taken into account when running afterwards (CacheQuickHandler off). PR 21935. [Yann Ylavic] *) mod_http2: new directive 'H2EarlyHints' to enable sending of HTTP status 103 interim responses. Disabled by default. [Stefan Eissing] *) mod_ssl: Fix quick renegotiation (OptRenegotiaton) with no intermediate in the client certificate chain. PR 55786. [Yann Ylavic] *) event: Allow to use the whole allocated scoreboard (up to ServerLimit slots) to avoid scoreboard full errors when some processes are finishing gracefully. Also, make gracefully finishing processes close all keep-alive connections. PR 53555. [Stefan Fritsch] *) mpm_event: Don't take over scoreboard slots from gracefully finishing threads. [Stefan Fritsch] *) mpm_event: Free memory earlier when shutting down processes. [Stefan Fritsch] *) mod_status: Display the process slot number in the async connection overview. [Stefan Fritsch] *) mod_dir: Responses that go through "FallbackResource" might appear to hang due to unterminated chunked encoding. PR58292. [Eric Covener] *) mod_dav: Fix a potential cause of unbounded memory usage or incorrect behavior in a routine that sends 's to the output filters. [Evgeny Kotkov] *) mod_http2: new directive 'H2PushResource' to enable early pushes before processing of the main request starts. Resources are announced to the client in Link headers on a 103 early hint response. All responses with status code , Yann Ylavic] *) mod_http2: unannounced and multiple interim responses (status code ] *) mod_http2: if configured with nghttp2 1.14.0 and onward, invalid request headers will immediately reset the stream with a PROTOCOL error. Feature logged by module on startup as 'INVHD' in info message. [Stefan Eissing] *) mod_http2: fixed handling of stream buffers during shutdown. [Stefan Eissing] *) mod_reqtimeout: Fix body timeout disabling for CONNECT requests to avoid triggering mod_proxy_connect's AH01018 once the tunnel is established. [Yann Ylavic] *) ab: Set the Server Name Indication (SNI) extension on outgoing TLS connections (unless -I is specified), according to the Host header (if any) or the requested URL's hostname otherwise. [Yann Ylavic] *) mod_proxy_fcgi: avoid loops when ProxyErrorOverride is enabled and the error documents are proxied. PR 55415. [Luca Toscano] *) mod_proxy_fcgi: read the whole FCGI response even when the content has not been modified (HTTP 304) or in case of a precondition failure (HTTP 412) to avoid subsequent bogus reads and confusing error messages logged. [Luca Toscano] *) mod_http2: h2 status resource follows latest draft, see http://www.ietf.org/id/draft-benfield-http2-debug-state-01.txt [Stefan Eissing] *) mod_http2: handling graceful shutdown gracefully, e.g. handling existing streams to the end. [Stefan Eissing] *) mod_proxy_{http,ajp,fcgi}: don't reuse backend connections with data available before the request is sent. PR 57832. [Yann Ylavic] *) mod_proxy_balancer: Prevent redirect loops between workers within a balancer by limiting the number of redirects to the number balancer members. PR 59864 [Ruediger Pluem] *) mod_proxy: Correctly consider error response codes by the backend when processing failonstatus. PR 59869 [Ruediger Pluem] *) mod_dav: Add dav_get_provider_name() function to obtain the name of the provider from mod_dav. [Graham Leggett] *) mod_dav: Add support for childtags to dav_error. [Jari Urpalainen ] *) mod_proxy_fcgi: Fix 2.4.23 breakage for mod_rewrite per-dir and query string showing up in SCRIPT_FILENAME. PR59815 *) mod_include: Fix a potential memory misuse while evaluating expressions. PR59844. [Eric Covener] *) mod_http2: new H2CopyFiles directive that changes treatment of file handles in responses. Necessary in order to fix broken lifetime handling in modules such as mod_wsgi. *) mod_http2: removing timeouts on master connection while requests are being processed. Requests may timeout, but the master only times out when no more requests are active. [Stefan Eissing] *) mod_http2: fixes connection flush when answering SETTINGS without any stream open. [Moto Ishizawa , Stefan Eissing] Changes with Apache 2.4.23 *) mod_ssl: reset client-verify state of ssl when aborting renegotiations. [Erki Aring , Stefan Eissing] *) mod_sed: Fix 'x' command processing. [Christophe Jaillet] *) configure: Fix ./configure edge-case failures around dependencies of mod_proxy_hcheck. [William Rowe, Ruediger Pluem, Jeff Trawick] Changes with Apache 2.4.22 *) mod_http2: fix for request abort when connections drops, introduced in 1.5.8 Changes with Apache 2.4.21 *) core: Added support for HTTP code 451. PR 58985. [Yehuda Katz , Jim Jagielski] *) ab: Use caseless matching for HTTP tokens (e.g. content-length). PR 59111. [Yann Ylavic] *) mod_http2: more rigid error handling in DATA frame assembly, leading to deterministic connection errors if assembly fails. [Stefan Eissing, Pal Nilsen ] *) abs: Include OPENSSL_Applink when compiling on Windows, to resolve failures under Visual Studio 2015 and other mismatched MSVCRT flavors. PR59630 [Jan Ehrhardt ] *) mod_ssl: Add "no_crl_for_cert_ok" flag to SSLCARevocationCheck directive to opt-in previous behaviour (2.2) with CRLs verification when checking certificate(s) with no corresponding CRL. [Yann Ylavic] *) mpm_event, mpm_worker: Fix computation of MinSpareThreads' lower bound according the number of listeners buckets. [Yann Ylavic] *) Add ap_cstr_casecmp[n]() - placeholder of apr_cstr_casecmp[n] functions for case-insensitive C/POSIX-locale token comparison. [Jim Jagielski, William Rowe, Yann Ylavic, Branko Čibej] *) mod_userdir: Constify and save a few bytes in the conf pool when parsing the "UserDir" directive. [Christophe Jaillet] *) mod_cache: Fix (max-stale with no '=') and enforce (check integers after '=') Cache-Control header parsing. [Christophe Jaillet] *) core: Add -DDUMP_INCLUDES configtest option to show the tree of Included configuration files. [Jacob Champion ] *) mod_proxy_fcgi: Avoid passing a filename of proxy:fcgi:// as SCRIPT_FILENAME to a FastCGI server. PR59618. [Jacob Champion ] *) mod_dav: Add dav_get_provider_name() function to obtain the name of the provider from mod_dav. [Jari Urpalainen ] *) mod_proxy_http2: properly care for HTTP2 flow control of the frontend connection is HTTP/1.1. [Patch supplied by Evgeny Kotkov] *) mod_http2: improved cleanup of connection/streams/tasks to always have deterministic order regardless of event initiating it. Addresses reported crashes due to memory read after free issues. [Stefan Eissing] *) mod_ssl: Correct the interaction between SSLProxyCheckPeerCN and newer SSLProxyCheckPeerName directives since release 2.4.5, such that disabling either disables both, and that enabling either triggers the new, more comprehensive SSLProxyCheckPeerName behavior. Only a single configuration remains to enable the legacy behavior, which is to explicitly disable SSLProxyCheckPeerName, and enable SSLProxyCheckPeerCN. [William Rowe] *) mod_include: add the statements. [Christophe Jaillet] *) split-logfile: Fix perl error: 'Can't use string ("example.org:80") as a symbol ref while "strict refs"'. PR 56329. [Holger Mauermann ] *) mod_proxy: Prevent ProxyPassReverse from doing a substitution when the URL parameter interpolates to an empty string. PR 56603. [] *) core: Fix -D[efined] or [d] variables lifetime across restarts. PR 57328. [Armin Abfalterer , Yann Ylavic]. *) mod_proxy: Preserve original request headers even if they differ from the ones to be forwarded to the backend. PR 45387. [Yann Ylavic] *) mod_ssl: dump SSL IO/state for the write side of the connection(s), like reads (level TRACE4). [Yann Ylavic] *) mod_proxy_fcgi: Ignore body data from backend for 304 responses. PR 57198. [Jan Kaluza] *) mod_ssl: Do not crash when looking up SSL related variables during expression evaluation on non SSL connections. PR 57070 [Ruediger Pluem] *) mod_proxy_ajp: Fix handling of the default port (8009) in the ProxyPass and configurations. PR 57259. [Yann Ylavic] *) mpm_event: Avoid a possible use after free when notifying the end of connection during lingering close. PR 57268. [Eric Covener, Yann Ylavic] *) mod_ssl: Fix recognition of OCSP stapling responses that are encoded improperly or too large. [Jeff Trawick] *) core: Add ap_log_data(), ap_log_rdata(), etc. for logging buffers. [Jeff Trawick] *) mod_proxy_fcgi, mod_authnz_fcgi: stop reading the response and issue an error when parsing or forwarding the response fails. [Yann Ylavic] *) mod_ssl: Fix a memory leak in case of graceful restarts with OpenSSL >= 0.9.8e PR 53435 [tadanori , Sebastian Wiedenroth ] *) mod_proxy_connect: Don't issue AH02447 on sockets hangups, let the read determine whether it is a normal close or a real error. PR 57168. [Yann Ylavic] *) mod_proxy_wstunnel: abort backend connection on polling error to avoid further processing. [Yann Ylavic] *) core: Support custom ErrorDocuments for HTTP 501 and 414 status codes. PR 57167 [Edward Lu ] *) mod_proxy_connect: Fix ProxyRemote to https:// backends on EBCDIC systems. PR 57092 [Edward Lu ] *) mod_cache: Avoid a 304 response to an unconditional request when an AH00752 CacheLock error occurs during cache revalidation. [Eric Covener] *) mod_ssl: Move OCSP stapling information from a per-certificate store to a per-server hash. PR 54357, PR 56919. [Alex Bligh , Yann Ylavic, Kaspar Brand] *) mod_cache_socache: Change average object size hint from 32 bytes to 2048 bytes. [Rainer Jung] *) mod_cache_socache: Add cache status to server-status. [Rainer Jung] *) event: Fix worker-listener deadlock in graceful restart. PR 56960. *) Concat strings at compile time when possible. PR 53741. *) mod_substitute: Restrict configuration in .htaccess to FileInfo as documented. [Rainer Jung] *) mod_substitute: Make maximum line length configurable. [Rainer Jung] *) mod_substitute: Fix line length limitation in case of regexp plus flatten. [Rainer Jung] *) mod_proxy: Truncated character worker names are no longer fatal errors. PR53218. [Jim Jagielski] *) mod_dav: Set r->status_line in dav_error_response. PR 55426. *) mod_proxy_http, mod_cache: Avoid (unlikely) accesses to freed memory. [Yann Ylavic, Christophe Jaillet] *) http_protocol: fix logic in ap_method_list_(add|remove) in order: - to correctly reset bits - not to modify the 'method_mask' bitfield unnecessarily [Christophe Jaillet] *) mod_slotmem_shm: Increase log level for some originally debug messages. [Jim Jagielski] *) mod_ldap: In 2.4.10, some LDAP searches or comparisons might be done with the wrong credentials when a backend connection is reused. [Eric Covener] *) mod_macro: Add missing APLOGNO for some Warning log messages. [Christophe Jaillet] *) mod_cache: Avoid sending 304 responses during failed revalidations PR56881. [Eric Covener] *) mod_status: Honor client IP address using mod_remoteip. PR 55886. [Jim Jagielski] *) cmake-based build for Windows: Fix incompatibility with cmake 2.8.12 and later. PR 56615. [Chuck Liu , Jeff Trawick] *) mod_ratelimit: Drop severity of AH01455 and AH01457 (ap_pass_brigade failed) messages from ERROR to TRACE1. Other filters do not bother re-reporting failures from lower level filters. PR56832. [Eric Covener] *) core: Avoid useless warning message when parsing a section guarded by if $(foo) is used within the section. PR 56503 [Christophe Jaillet] *) mod_proxy_fcgi: Fix faulty logging of large amounts of stderr from the application. PR 56858. [Manuel Mausz ] *) mod_proxy_http: Proxy responses with error status and "ProxyErrorOverride On" hang until proxy timeout. PR53420 [Rainer Jung] *) mod_log_config: Allow three character log formats to be registered. For backwards compatibility, the first character of a three-character format must be the '^' (caret) character. [Eric Covener] *) mod_lua: Don't quote Expires and Path values. PR 56734. [Keith Mashinter, ] *) mod_authz_core: Allow 'es to be seen from auth stanzas under virtual hosts. PR 56870. [Eric Covener] Changes with Apache 2.4.10 *) SECURITY: CVE-2014-0117 (cve.mitre.org) mod_proxy: Fix crash in Connection header handling which allowed a denial of service attack against a reverse proxy with a threaded MPM. [Ben Reser] *) SECURITY: CVE-2014-3523 (cve.mitre.org) Fix a memory consumption denial of service in the WinNT MPM, used in all Windows installations. Workaround: AcceptFilter {none|connect} [Jeff Trawick] *) SECURITY: CVE-2014-0226 (cve.mitre.org) Fix a race condition in scoreboard handling, which could lead to a heap buffer overflow. [Joe Orton, Eric Covener] *) SECURITY: CVE-2014-0118 (cve.mitre.org) mod_deflate: The DEFLATE input filter (inflates request bodies) now limits the length and compression ratio of inflated request bodies to avoid denial of service via highly compressed bodies. See directives DeflateInflateLimitRequestBody, DeflateInflateRatioLimit, and DeflateInflateRatioBurst. [Yann Ylavic, Eric Covener] *) SECURITY: CVE-2014-0231 (cve.mitre.org) mod_cgid: Fix a denial of service against CGI scripts that do not consume stdin that could lead to lingering HTTPD child processes filling up the scoreboard and eventually hanging the server. By default, the client I/O timeout (Timeout directive) now applies to communication with scripts. The CGIDScriptTimeout directive can be used to set a different timeout for communication with scripts. [Rainer Jung, Eric Covener, Yann Ylavic] *) mod_ssl: Extend the scope of SSLSessionCacheTimeout to sessions resumed by TLS session resumption (RFC 5077). [Rainer Jung] *) mod_deflate: Don't fail when flushing inflated data to the user-agent and that coincides with the end of stream ("Zlib error flushing inflate buffer"). PR 56196. [Christoph Fausak ] *) mod_proxy_ajp: Forward local IP address as a custom request attribute like we already do for the remote port. [Rainer Jung] *) core: Include any error notes set by modules in the canned error response for 403 errors. [Jeff Trawick] *) mod_ssl: Set an error note for requests rejected due to SSLStrictSNIVHostCheck. [Jeff Trawick] *) mod_ssl: Fix issue with redirects to error documents when handling SNI errors. [Jeff Trawick] *) mod_ssl: Fix tmp DH parameter leak, adjust selection to prefer larger keys and support up to 8192-bit keys. [Ruediger Pluem, Joe Orton] *) mod_dav: Fix improper encoding in PROPFIND responses. PR 56480. [Ben Reser] *) WinNT MPM: Improve error handling for termination events in child. [Jeff Trawick] *) mod_proxy: When ping/pong is configured for a worker, don't send or forward "100 Continue" (interim) response to the client if it does not expect one. [Yann Ylavic] *) mod_ldap: Be more conservative with the last-used time for LDAPConnectionPoolTTL. PR54587 [Eric Covener] *) mod_ldap: LDAP connections used for authn were not respecting LDAPConnectionPoolTTL. PR54587 [Eric Covener] *) mod_proxy_fcgi: Fix occasional high CPU when handling request bodies. [Jeff Trawick] *) event MPM: Fix possible crashes (third-party modules accessing c->sbh) or occasional missed mod_status updates under load. PR 56639. [Edward Lu ] *) mod_authnz_ldap: Support primitive LDAP servers do not accept filters, such as "SDBM-backed LDAP" on z/OS, by allowing a special filter "none" to be specified in AuthLDAPURL. [Eric Covener] *) mod_deflate: Fix inflation of files larger than 4GB. PR 56062. [Lukas Bezdicka ] *) mod_deflate: Handle Zlib header and validation bytes received in multiple chunks. PR 46146. [Yann Ylavic] *) mod_proxy: Allow reverse-proxy to be set via explicit handler. [ryo takatsuki ] *) ab: support custom HTTP method with -m argument. PR 56604. [Roman Jurkov ] *) mod_proxy_balancer: Correctly encode user provided data in management interface. PR 56532 [Maksymilian, ] *) mod_proxy: Don't limit the size of the connectable Unix Domain Socket paths. [Graham Dumpleton, Christophe Jaillet, Yann Ylavic] *) mod_proxy_fcgi: Support iobuffersize parameter. [Jeff Trawick] *) event: Send the SSL close notify alert when the KeepAliveTimeout expires. PR54998. [Yann Ylavic] *) mod_ssl: Ensure that the SSL close notify alert is flushed to the client. PR54998. [Tim Kosse , Yann Ylavic] *) mod_proxy: Shutdown (eg. SSL close notify) the backend connection before closing. [Yann Ylavic] *) mod_auth_form: Add a debug message when the fields on a form are not recognised. [Graham Leggett] *) mod_cache: Preserve non-cacheable headers forwarded from an origin 304 response. PR 55547. [Yann Ylavic] *) mod_proxy_wstunnel: Fix the use of SSL connections with the "wss:" scheme. PR55320. [Alex Liu ] *) mod_socache_shmcb: Correct counting of expirations for status display. Expirations happening during retrieval were not counted. [Rainer Jung] *) mod_cache: Retry unconditional request with the full URL (including the query-string) when the origin server's 304 response does not match the conditions used to revalidate the stale entry. [Yann Ylavic]. *) mod_alias: Stop setting CONTEXT_PREFIX and CONTEXT_DOCUMENT environment variables as a result of AliasMatch. [Eric Covener] *) mod_cache: Don't add cached/revalidated entity headers to a 304 response. PR 55547. [Yann Ylavic] *) mod_proxy_scgi: Support Unix sockets. ap_proxy_port_of_scheme(): Support default SCGI port (4000). [Jeff Trawick] *) mod_cache: Fix AH00784 errors on Windows when the the CacheLock directive is enabled. [Eric Covener] *) mod_expires: don't add Expires header to error responses (4xx/5xx), be they generated or forwarded. PR 55669. [Yann Ylavic] *) mod_proxy_fcgi: Don't segfault when failing to connect to the backend. (regression in 2.4.9 release) [Jeff Trawick] *) mod_authn_socache: Fix crash at startup in certain configurations. PR 56371. (regression in 2.4.7) [Jan Kaluza] *) mod_ssl: restore argument structure for "exec"-type SSLPassPhraseDialog programs to the form used in releases up to 2.4.7, and emulate a backwards-compatible behavior for existing setups. [Kaspar Brand] *) mod_ssl: Add SSLOCSPUseRequestNonce directive to control whether or not OCSP requests should use a nonce to be checked against the responder's one. PR 56233. [Yann Ylavic, Kaspar Brand] *) mod_ssl: "SSLEngine off" will now override a Listen-based default and does disable mod_ssl for the vhost. [Joe Orton] *) mod_lua: Enforce the max post size allowed via r:parsebody() [Daniel Gruno] *) mod_lua: Use binary comparison to find boundaries for multipart objects, as to not terminate our search prematurely when hitting a NULL byte. [Daniel Gruno] *) mod_ssl: add workaround for SSLCertificateFile when using OpenSSL versions before 0.9.8h and not specifying an SSLCertificateChainFile (regression introduced with 2.4.8). PR 56410. [Kaspar Brand] *) mod_ssl: bring SNI behavior into better conformance with RFC 6066: no longer send warning-level unrecognized_name(112) alerts, and limit startup warnings to cases where an OpenSSL version without TLS extension support is used. PR 56241. [Kaspar Brand] *) mod_proxy_html: Avoid some possible memory access violation in case of specially crafted files, when the ProxyHTMLMeta directive is turned on. Follow up of PR 56287 [Christophe Jaillet] *) mod_auth_form: Make sure the optional functions are loaded even when the AuthFormProvider isn't specified. [Graham Leggett] *) mod_ssl: avoid processing bogus SSLCertificateKeyFile values (and logging garbled file names). PR 56306. [Kaspar Brand] *) mod_ssl: fix merging of global and vhost-level settings with the SSLCertificateFile, SSLCertificateKeyFile, and SSLOpenSSLConfCmd directives. PR 56353. [Kaspar Brand] *) mod_headers: Allow the "value" parameter of Header and RequestHeader to contain an ap_expr expression if prefixed with "expr=". [Eric Covener] *) rotatelogs: Avoid creation of zombie processes when -p is used on Unix platforms. [Joe Orton] *) mod_authnz_fcgi: New module to enable FastCGI authorizer applications to authenticate and/or authorize clients. [Jeff Trawick] *) mod_proxy: Do not try to parse the regular expressions passed by ProxyPassMatch as URL as they do not follow their syntax. PR 56074. [Ruediger Pluem] *) mod_reqtimeout: Resolve unexpected timeouts on keepalive requests under the Event MPM. PR56216. [Frank Meier ] *) mod_proxy_fcgi: Fix sending of response without some HTTP headers that might be set by filters. PR 55558. [Jim Riggs ] *) mod_proxy_html: Do not delete the wrong data from HTML code when a "http-equiv" meta tag specifies a Content-Type behind any other "http-equiv" meta tag. PR 56287 [Micha Lenk ] *) mod_proxy: Don't reuse a SSL backend connection whose requested SNI differs. PR 55782. [Yann Ylavic] *) Add suspend_connection and resume_connection hooks to notify modules when the thread/connection relationship changes. (Should be implemented for any third-party async MPMs.) [Jeff Trawick] *) mod_proxy_wstunnel: Don't issue AH02447 and log a 500 on routine hangups from websockets origin servers. PR 56299 [Yann Ylavic, Edward Lu , Eric Covener] *) mod_proxy_wstunnel: Don't pool backend websockets connections, because we need to handshake every time. PR 55890. [Eric Covener] *) mod_lua: Redesign how request record table access behaves, in order to utilize the request record from within these tables. [Daniel Gruno] *) mod_lua: Add r:wspeek for peeking at WebSocket frames. [Daniel Gruno] *) mod_lua: Log an error when the initial parsing of a Lua file fails. [Daniel Gruno, Felipe Daragon ] *) mod_lua: Reformat and escape script error output. [Daniel Gruno, Felipe Daragon ] *) mod_lua: URL-escape cookie keys/values to prevent tainted cookie data from causing response splitting. [Daniel Gruno, Felipe Daragon ] *) mod_lua: Disallow newlines in table values inside the request_rec, to prevent HTTP Response Splitting via tainted headers. [Daniel Gruno, Felipe Daragon ] *) mod_lua: Remove the non-working early/late arguments for LuaHookCheckUserID. [Daniel Gruno] *) mod_lua: Change IVM storage to use shm [Daniel Gruno] *) mod_lua: More verbose error logging when a handler function cannot be found. [Daniel Gruno] Changes with Apache 2.4.9 *) mod_ssl: Work around a bug in some older versions of OpenSSL that would cause a crash in SSL_get_certificate for servers where the certificate hadn't been sent. [Stephen Henson] *) mod_lua: Add a fixups hook that checks if the original request is intended for LuaMapHandler. This fixes a bug where FallbackResource invalidates the LuaMapHandler directive in certain cases by changing the URI before the map handler code executes [Daniel Gruno, Daniel Ferradal ]. Changes with Apache 2.4.8 (not released) *) SECURITY: CVE-2014-0098 (cve.mitre.org) Clean up cookie logging with fewer redundant string parsing passes. Log only cookies with a value assignment. Prevents segfaults when logging truncated cookies. [William Rowe, Ruediger Pluem, Jim Jagielski] *) SECURITY: CVE-2013-6438 (cve.mitre.org) mod_dav: Keep track of length of cdata properly when removing leading spaces. Eliminates a potential denial of service from specifically crafted DAV WRITE requests [Amin Tora ] *) core: Support named groups and backreferences within the LocationMatch, DirectoryMatch, FilesMatch and ProxyMatch directives. (Requires non-ancient PCRE library) [Graham Leggett] *) core: draft-ietf-httpbis-p1-messaging-23 corrections regarding TE/CL conflicts. [Yann Ylavic, Jim Jagielski] *) core: Detect incomplete request and response bodies, log an error and forward it to the underlying filters. PR 55475 [Yann Ylavic] *) mod_dir: Add DirectoryCheckHandler to allow a 2.2-like behavior, skipping execution when a handler is already set. PR53929. [Eric Covener] *) mod_ssl: Do not perform SNI / Host header comparison in case of a forward proxy request. [Ruediger Pluem] *) mod_ssl: Remove the hardcoded algorithm-type dependency for the SSLCertificateFile and SSLCertificateKeyFile directives, to enable future algorithm agility, and deprecate the SSLCertificateChainFile directive (obsoleted by SSLCertificateFile). [Kaspar Brand] *) mod_rewrite: Add RewriteOptions InheritDown, InheritDownBefore, and IgnoreInherit to allow RewriteRules to be pushed from parent scopes to child scopes without explicitly configuring each child scope. PR56153. [Edward Lu ] *) prefork: Fix long delays when doing a graceful restart. PR 54852 [Jim Jagielski, Arkadiusz Miskiewicz ] *) FreeBSD: Disable IPv4-mapped listening sockets by default for versions 5+ instead of just for FreeBSD 5. PR 53824. [Jeff Trawick] *) mod_proxy_wstunnel: Avoid busy loop on client errors, drop message IDs 02445, 02446, and 02448 to TRACE1 from DEBUG. PR 56145. [Joffroy Christen , Eric Covener] *) mod_remoteip: Correct the trusted proxy match test. PR 54651. [Yoshinori Ehara , Eugene L ] *) mod_proxy_fcgi: Fix error message when an unexpected protocol version number is received from the application. PR 56110. [Jeff Trawick] *) mod_remoteip: Use the correct IP addresses to populate the proxy_ips field. PR 55972. [Mike Rumph] *) mod_lua: Update r:setcookie() to accept a table of options and add domain, path and httponly to the list of options available to set. PR 56128 [Edward Lu , Daniel Gruno] *) mod_lua: Fix r:setcookie() to add, rather than replace, the Set-Cookie header. PR56105 [Kevin J Walters , Edward Lu ] *) mod_lua: Allow for database results to be returned as a hash with row-name/value pairs instead of just row-number/value. [Daniel Gruno] *) mod_rewrite: Add %{CONN_REMOTE_ADDR} as the non-useragent counterpart to %{REMOTE_ADDR}. PR 56094. [Edward Lu ] *) WinNT MPM: If ap_run_pre_connection() fails or sets c->aborted, don't save the socket for reuse by the next worker as if it were an APR_SO_DISCONNECTED socket. Restores 2.2 behavior. [Eric Covener] *) mod_dir: Don't search for a DirectoryIndex or DirectorySlash on a URL that was just rewritten by mod_rewrite. PR53929. [Eric Covener] *) mod_session: When we have a session we were unable to decode, behave as if there was no session at all. [Thomas Eckert ] *) mod_session: Fix problems interpreting the SessionInclude and SessionExclude configuration. PR 56038. [Erik Pearson ] *) mod_authn_core: Allow 'es to be seen from auth stanzas under virtual hosts. PR 55622. [Eric Covener] *) mod_proxy_fcgi: Use apr_socket_timeout_get instead of hard-coded 30 seconds timeout. [Jan Kaluza] *) build: only search for modules (config*.m4) in known subdirectories, see build/config-stubs. [Stefan Fritsch] *) mod_cache_disk: Fix potential hangs on Windows when using mod_cache_disk. PR 55833. [Eric Covener] *) mod_ssl: Add support for OpenSSL configuration commands by introducing the SSLOpenSSLConfCmd directive. [Stephen Henson, Kaspar Brand] *) mod_proxy: Remove (never documented) syntax which is equivalent to . [Christophe Jaillet] *) mod_authz_user, mod_authz_host, mod_authz_groupfile, mod_authz_dbm, mod_authz_dbd, mod_authnz_ldap: Support the expression parser within the require directives. [Graham Leggett] *) mod_proxy_http: Core dumped under high load. PR 50335. [Jan Kaluza ] *) mod_socache_shmcb.c: Remove arbitrary restriction on shared memory size previously limited to 64MB. [Jens Låås ] *) mod_lua: Use binary copy when dealing with uploads through r:parsebody() to prevent truncating files. [Daniel Gruno] Changes with Apache 2.4.7 *) SECURITY: CVE-2013-4352 (cve.mitre.org) mod_cache: Fix a NULL pointer deference which allowed untrusted origin servers to crash mod_cache in a forward proxy configuration. [Graham Leggett] *) APR 1.5.0 or later is now required for the event MPM. *) slotmem_shm: Error detection. [Jim Jagielski] *) event: Use skiplist data structure. [Jim Jagielski] *) event: Fail at startup with message AP02405 if the APR atomic implementation is not compatible with the MPM. [Jim Jagielski] *) mpm_unix: Add ap_mpm_podx_* implementation to avoid code duplication and align w/ trunk. [Jim Jagielski] *) Fix potential rejection of valid MaxMemFree and ThreadStackSize directives. [Mike Rumph ] *) mod_proxy_fcgi: Remove 64K limit on encoded length of all envvars. An individual envvar with an encoded length of more than 16K will be omitted. [Jeff Trawick] *) mod_proxy_fcgi: Handle reading protocol data that is split between packets. [Jeff Trawick] *) mod_ssl: Improve handling of ephemeral DH and ECDH keys by allowing custom parameters to be configured via SSLCertificateFile, and by adding standardized DH parameters for 1024/2048/3072/4096 bits. Unless custom parameters are configured, the standardized parameters are applied based on the certificate's RSA/DSA key size. [Kaspar Brand] *) mod_ssl, configure: Require OpenSSL 0.9.8a or later. [Kaspar Brand] *) mod_ssl: drop support for export-grade ciphers with ephemeral RSA keys, and unconditionally disable aNULL, eNULL and EXP ciphers (not overridable via SSLCipherSuite). [Kaspar Brand] *) mod_proxy: Added support for unix domain sockets as the backend server endpoint. This also introduces an unintended incompatibility for third party modules using the mod_proxy proxy_worker_shared structure, especially for balancer lbmethod modules. [Jim Jagielski, Blaise Tarr ] *) Add experimental cmake-based build system for Windows. [Jeff Trawick, Tom Donovan] *) event MPM: Fix possible crashes (third party modules accessing c->sbh) or occasional missed mod_status updates for some keepalive requests under load. [Eric Covener] *) mod_authn_socache: Support optional initialization arguments for socache providers. [Chris Darroch] *) mod_session: Reset the max-age on session save. PR 47476. [Alexey Varlamov ] *) mod_session: After parsing the value of the header specified by the SessionHeader directive, remove the value from the response. PR 55279. [Graham Leggett] *) mod_headers: Allow for format specifiers in the substitution string when using Header edit. [Daniel Ruggeri] *) mod_dav: dav_resource->uri is treated as unencoded. This was an unnecessary ABI changed introduced in 2.4.6. PR 55397. *) mod_dav: Don't require lock tokens for COPY source. PR 55306. *) core: Don't truncate output when sending is interrupted by a signal, such as from an exiting CGI process. PR 55643. [Jeff Trawick] *) WinNT MPM: Exit the child if the parent process crashes or is terminated. [Oracle Corporation] *) Windows: Correct failure to discard stderr in some error log configurations. (Error message AH00093) [Jeff Trawick] *) mod_session_crypto: Allow using exec: calls to obtain session encryption key. [Daniel Ruggeri] *) core: Add missing Reason-Phrase in HTTP response headers. PR 54946. [Rainer Jung] *) mod_rewrite: Make rewrite websocket-aware to allow proxying. PR 55598. [Chris Harris ] *) mod_ldap: When looking up sub-groups, use an implicit objectClass=* instead of an explicit cn=* filter. [David Hawes ] *) ab: Add wait time, fix processing time, and output write errors only if they occurred. [Christophe Jaillet] *) worker MPM: Don't forcibly kill worker threads if the child process is exiting gracefully. [Oracle Corporation] *) core: apachectl -S prints wildcard name-based virtual hosts twice. PR54948 [Eric Covener] *) mod_auth_basic: Add AuthBasicUseDigestAlgorithm directive to allow migration of passwords from digest to basic authentication. [Chris Darroch] *) ab: Add a new -l parameter in order not to check the length of the responses. This can be useful with dynamic pages. PR9945, PR27888, PR42040 [] *) Suppress formatting of startup messages written to the console when ErrorLogFormat is used. [Jeff Trawick] *) mod_auth_digest: Be more specific when the realm mismatches because the realm has not been specified. [Graham Leggett] *) mod_proxy: Add a note in the balancer manager stating whether changes will or will not be persisted and whether settings are inherited. [Daniel Ruggeri, Jim Jagielski] *) core: Add util_fcgi.h and associated definitions and support routines for FastCGI, based largely on mod_proxy_fcgi. [Jeff Trawick] *) mod_headers: Add 'Header note header-name note-name' for copying a response headers value into a note. [Eric Covener] *) mod_headers: Add 'setifempty' command to Header and RequestHeader. [Eric Covener] *) mod_logio: new format-specifier %S (sum) which is the sum of received and sent byte counts. PR54015 [Christophe Jaillet] *) mod_deflate: Improve error detection when decompressing request bodies with trailing garbage: handle case where trailing bytes are in the same bucket. [Rainer Jung] *) mod_authz_groupfile, mod_authz_user: Reduce severity of AH01671 and AH01663 from ERROR to DEBUG, since these modules do not know what mod_authz_core is doing with their AUTHZ_DENIED return value. [Eric Covener] *) mod_ldap: add TRACE5 for LDAP retries. [Eric Covener] *) mod_ldap: retry on an LDAP timeout during authn. [Eric Covener] *) mod_ldap: Change "LDAPReferrals off" to actually set the underlying LDAP SDK option to OFF, and introduce "LDAPReferrals default" to take the SDK default, sans rebind authentication callback. [Jan Kaluza ] *) core: Log a message at TRACE1 when the client aborts a connection. [Eric Covener] *) WinNT MPM: Don't crash during child process initialization if the Listen protocol is unrecognized. [Jeff Trawick] *) modules: Fix some compiler warnings. [Guenter Knauf] *) Sync 2.4 and trunk - Avoid some memory allocation and work when TRACE1 is not activated - fix typo in include guard - indent - No need to lower the string before removing the path, it is just a waste of time... - Save a few cycles [Christophe Jaillet ] *) mod_filter: Add "change=no" as a proto-flag to FilterProtocol to remove a providers initial flags set at registration time. [Eric Covener] *) core, mod_ssl: Enable the ability for a module to reverse the sense of a poll event from a read to a write or vice versa. This is a step on the way to allow mod_ssl taking full advantage of the event MPM. [Graham Leggett] *) Makefile.win: Install proper pcre DLL file during debug build install. PR 55235. [Ben Reser ] *) mod_ldap: Fix a potential memory leak or corruption. PR 54936. [Zhenbo Xu ] *) ab: Fix potential buffer overflows when processing the T and X command-line options. PR 55360. [Mike Rumph ] *) fcgistarter: Specify SO_REUSEADDR to allow starting a server with old connections in TIME_WAIT. [Jeff Trawick] *) core: Add open_htaccess hook which, in conjunction with dirwalk_stat and post_perdir_config (introduced in 2.4.5), allows mpm-itk to be used without patches to httpd core. [Stefan Fritsch] *) support/htdbm: fix processing of -t command line switch. Regression introduced in 2.4.4 PR 55264 [Jo Rhett ] *) mod_lua: add websocket support via r:wsupgrade, r:wswrite, r:wsread and r:wsping. [Daniel Gruno] *) mod_lua: add support for writing/reading cookies via r:getcookie and r:setcookie. [Daniel Gruno] *) mod_lua: If the first yield() of a LuaOutputFilter returns a string, it should be prefixed to the response as documented. [Eric Covener] Note: Not present in 2.4.7 CHANGES *) mod_lua: Remove ETAG, Content-Length, and Content-MD5 when a LuaOutputFilter is configured without mod_filter. [Eric Covener] Note: Not present in 2.4.7 CHANGES *) mod_lua: Register LuaOutputFilter scripts as changing the content and content-length by default, when run my mod_filter. Previously, growing or shrinking a response that started with Content-Length set would require mod_filter and FilterProtocol change=yes. [Eric Covener] Note: Not present in 2.4.7 CHANGES *) mod_lua: Return a 500 error if a LuaHook* script doesn't return a numeric return code. [Eric Covener] Note: Not present in 2.4.7 CHANGES Changes with Apache 2.4.6 *) Revert a broken fix for PR54948 that was applied to 2.4.5 (which was not released) and found post-2.4.5 tagging. Changes with Apache 2.4.5 *) SECURITY: CVE-2013-1896 (cve.mitre.org) mod_dav: Sending a MERGE request against a URI handled by mod_dav_svn with the source href (sent as part of the request body as XML) pointing to a URI that is not configured for DAV will trigger a segfault. [Ben Reser ] *) SECURITY: CVE-2013-2249 (cve.mitre.org) mod_session_dbd: Make sure that dirty flag is respected when saving sessions, and ensure the session ID is changed each time the session changes. This changes the format of the updatesession SQL statement. Existing configurations must be changed. [Takashi Sato, Graham Leggett] *) mod_auth_basic: Add a generic mechanism to fake basic authentication using the ap_expr parser. AuthBasicFake allows the administrator to construct their own username and password for basic authentication based on their needs. [Graham Leggett] *) mpm_event: Check that AsyncRequestWorkerFactor is not negative. PR 54254. [Jackie Zhang ] *) mod_proxy: Ensure we don't attempt to amend a table we are iterating through, ensuring that all headers listed by Connection are removed. [Graham Leggett, Co-Advisor ] *) mod_proxy_http: Make the proxy-interim-response environment variable effective by formally overriding origin server behaviour. [Graham Leggett, Co-Advisor ] *) mod_proxy: Fix seg-faults when using the global pool on threaded MPMs [Thomas Eckert , Graham Leggett, Jim Jagielski] *) mod_deflate: Remove assumptions as to when an EOS bucket might arrive. Gracefully step aside if the body size is zero. [Graham Leggett] *) mod_ssl: Fix possible truncation of OCSP responses when reading from the server. [Joe Orton] *) core: Support the SINGLE_LISTEN_UNSERIALIZED_ACCEPT optimization on Linux kernel versions 3.x and above. PR 55121. [Bradley Heilbrun ] *) mod_cache_socache: Make sure the CacheSocacheMaxSize directive is merged correctly. [Jens Låås ] *) rotatelogs: add -n number-of-files option to rotate through a number of fixed-name logfiles. [Eric Covener] *) mod_proxy: Support web-socket tunnels via mod_proxy_wstunnel. [Jim Jagielski] *) mod_cache_socache: Use the name of the socache implementation when performing a lookup rather than using the raw arguments. [Martin Ksellmann ] *) core: Add dirwalk_stat hook. [Jeff Trawick] *) core: Add post_perdir_config hook. [Steinar Gunderson ] *) proxy_util: NULL terminate the right buffer in 'send_http_connect'. [Christophe Jaillet] *) mod_remoteip: close file in error path. [Christophe Jaillet] *) core: make the "default" parameter of the "ErrorDocument" option case insensitive. PR 54419 [Tianyin Xu ] *) mod_proxy_html: make the "ProxyHTMLFixups" options case insensitive. PR 54420 [Tianyin Xu ] *) mod_cache: Make option "CacheDisable" in mod_cache case insensitive. PR 54462 [Tianyin Xu ] *) mod_cache: If a 304 response indicates an entity not currently cached, then the cache MUST disregard the response and repeat the request without the conditional. [Graham Leggett, Co-Advisor ] *) mod_cache: Ensure that we don't attempt to replace a cached response with an older response as per RFC2616 13.12. [Graham Leggett, Co-Advisor ] *) core, mod_cache: Ensure RFC2616 compliance in ap_meets_conditions() with weak validation combined with If-Range and Range headers. Break out explicit conditional header checks to be useable elsewhere in the server. Ensure weak validation RFC compliance in the byteranges filter. Ensure RFC validation compliance when serving cached entities. PR 16142 [Graham Leggett, Co-Advisor ] *) core: Add the ability to do explicit matching on weak and strong ETags as per RFC2616 Section 13.3.3. [Graham Leggett, Co-Advisor ] *) mod_cache: Ensure that updated responses to HEAD requests don't get mistakenly paired with a previously cached body. Ensure that any existing body is removed when a HEAD request is cached. [Graham Leggett, Co-Advisor